DJI Agras T50 OEM Bottom Light Module (BC.AG.SS000677)

Bottom Light Module | Underside Illumination System | Low-Light Operations Lighting | Night Visibility Component | Field-Ready Replacement Component | DJI Material Number BC.AG.SS000677

DJI Material Number BC.AG.SS000677 — this is the official DJI part number for this exact component. Match it to your parts diagram or the label on the original part to confirm fitment; factory labels may carry a revision suffix, which is the same part.

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🇺🇸 U.S.A. FIRST

Ares Acres LLC is a U.S.-based authorized DJI Agras reseller supporting American agricultural drone operators with genuine DJI Agras OEM replacement parts, accessories, and field-ready inventory.

FREE & FAST Shipping is included for all U.S. customers.

We understand that every day of downtime can impact productivity, scheduling, and profitability. That's why we focus on providing fast fulfillment, responsive customer support, and reliable access to the parts operators need most.

Ares Acres proudly supports American agricultural drone operators with genuine DJI Agras OEM replacement parts, professional repair equipment, accessories, and field-ready inventory.

The best spraying windows don't keep business hours. Calm air comes at dawn and dusk, heat-sensitive applications want the cool of early morning, and contract season doesn't stop when the sun gets low — which is why serious operators fly in light most people would call done for the day.

The bottom light module is what makes those hours workable: it illuminates the underside of the aircraft so takeoffs, landings, and low-light navigation stay visible, controlled, and safe when ambient light isn't enough.

That is why Ares Acres keeps hard-to-find lighting hardware in stock and shipped fast to the U.S.A., helping operators keep every workable hour productive, minimize downtime, and keep their aircraft spraying when every acre counts.

For professional farmers, aerial applicators, and commercial drone operators, working light extends the working day.

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✅ DJI Agras T50 Compatibility Guarantee

• 🇺🇸 USA Compatibility Guarantee
• 👍🏻 Satisfaction Guarantee
• 💵 Money Back Guarantee
• 📦 Same Day Shipping & Tracking

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📦 Package Includes

• 1 × Bottom Light Module
• Premium illumination component
• Direct-fit replacement module
• Protective packaging

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🔧 Component Overview

The DJI Agras T50 Original Bottom Light Module is the underside illumination system for the DJI Agras T50 agricultural drone.

The module lights the underside of the aircraft — improving visibility during low-light and nighttime operations so takeoffs, landings, and navigation stay safe when ambient light runs out. Built durable and weather-resistant with efficient power draw that minimizes impact on flight time, a fresh module restores full illumination the moment a failing one comes off.

Commercial agricultural drones operate in demanding environments every day, including:

• Dawn and dusk spraying windows
• Nighttime application operations
• Crop spraying
• Liquid fertilizer application
• Orchard operations
• Vineyard spraying
• Precision agriculture missions
• Daily commercial deployments
• Fleet operations
• High-acreage contract work

Throughout these operations, bottom light modules are routinely exposed to:

• Continuous airframe vibration
• Heat cycling from LED operation
• Chemical mist and spray drift
• Dust and airborne field debris
• Moisture and washdown exposure
• UV exposure across long seasons
• Temperature swings in the field
• Impact risk at the underside position
• Connector stress at the mount
• Long commercial operating hours

Over time, this duty dims output, fatigues connections, and weathers housings — and a failing light means low-light hours the operation can no longer use.

The Bottom Light Module helps maintain:

• Clear underside visibility in low light
• Safe takeoffs and landings after dark
• Confident navigation in poor visibility
• Extended daily operating windows
• Efficient power use that protects flight time
• Reliable operation in all conditions
• Increased fleet readiness
• Maximum aircraft uptime
• Reliable commercial operation

For operators working dawn, dusk, and night windows, illumination integrity is non-negotiable.

Before assuming the module is dead, confirm that the aircraft is actually asking it to light. Underside lighting on modern airframes is often tied to a control setting or an automatic behaviour rather than a simple switch, so a module that stays dark in a bright hangar may be doing exactly what it was told. Take the aircraft somewhere genuinely dark, work through the lighting control the way the manual describes, and only call it a failure once you have commanded it on and watched nothing happen.

Clean the lens properly and then judge it again, because a filmed lens and a failing module look the same from the ground. Underside surfaces collect the heaviest chemical residue on the entire aircraft, since downwash recirculates mist straight back up against them on every pass. Wash with water and a mild detergent on a soft cloth, dry it, and reassess in the dark. A large recovery after cleaning means the emitters were never the problem.

Give yourself a measurement instead of a memory. Park the aircraft a fixed distance from a plain wall or a shed door in real darkness, switch the light on, and photograph the lit patch with a phone camera locked to manual exposure. Write the distance and the settings on the photograph. Repeat it at the same spot each pre-season and you can compare output year to year properly, which is the only honest way to catch a gradual fade before it starts costing you hours.

Distinguish a module that is losing light from one that is losing power, because they lead to different purchases. With the light commanded on, flex the lead by hand along its run and press the connector firmly into its socket while you watch the output. A light that blinks, brightens or dies in step with what your hand is doing has a wiring or connector fault. A light that ignores everything you do to the harness and stays dim or dark has failed internally.

Move the fault around if the airframe carries more than one of these modules or you have a second aircraft. Swap a known good module into the suspect position and the suspect module into the known good position. A fault that travels with the module is settled and you can order with confidence. A fault that stays with the position tells you the money belongs on the harness, the connector or whatever is controlling that circuit instead.

Watch the shape of the failure over the first minute. A module that lights at full strength and then visibly fades within a minute or two is shedding heat badly rather than failing electrically, and that usually traces to a mount that has loosened, a heat path broken by dried product packed behind the housing, or a cracked bracket. Thermal fade is smooth and gradual. An electrical fault is abrupt, unstable, and repeatable by touching the wiring.

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⚙️ Functional Purpose

The Bottom Light Module is designed to illuminate the underside of the DJI Agras T50 during low-light operations.

The component helps:

• Illuminate the aircraft underside in low light
• Support safe takeoffs and landings after dark
• Improve visibility during night operations
• Aid navigation in poor-visibility conditions
• Extend usable operating hours per day
• Minimize power draw to protect flight time
• Replace dimming, flickering, or failed modules
• Restore factory illumination performance
• Integrate seamlessly with the T50 architecture
• Support preventative maintenance
• Increase fleet readiness
• Keep lighting hardware field-ready

Every low-light hour the operation flies is an hour this module makes visible — and the schedule is only as long as the lighting allows.

A sound bottom light keeps dawn, dusk, and night windows open through season after season of extended-hours duty.

A worn or damaged bottom light may contribute to:

• Dim or failed underside illumination
• Risky low-light takeoffs and landings
• Restricted operating hours
• Lost dawn and dusk spray windows
• Flickering or intermittent lighting
• Reduced situational visibility
• Interrupted spraying missions
• Unexpected downtime
• Reduced fleet reliability

Replacing a failing module restores the visibility extended-hours operations are built on.

Get the tank empty and the aircraft properly supported before you go underneath it. A loaded agricultural airframe is heavy, and this job puts your face and hands directly under the machine for several minutes. Use stands or a bench rather than working under an aircraft balanced on its own gear, and never rely on someone holding it. Nothing about this component is worth doing in a hurry at the edge of a field with the aircraft resting on soft ground.

Rinse the underside thoroughly before any fastener is loosened, and mean it. This is the surface that catches recirculated spray on every pass, so it carries more dried product than anywhere else on the aircraft, and you are about to be working face up beneath it. Anything you disturb falls into your eyes. A few minutes with clean water and a soft brush first makes the whole job cleaner, safer, and easier to see what you are actually doing.

Record the aim before anything moves. An underside light is pointed, and the difference between useful illumination and a bright patch in the wrong place is a few degrees at the bracket. Photograph the module in position from two angles, mark the bracket against the structure with a pencil or a piece of tape, and note where the lead exits and which way the connector is clocked. Reproduce all of it on refit rather than working out the aim by trial and error in the dark.

Release the electrical connector by its body and its latch rather than by pulling on the cable, and note the keying before it separates. This plug lives in the wettest, dirtiest position on the airframe and it can be stiff enough that grabbing the wire feels reasonable. If it will not part, clean and dry it instead of pulling harder. A pin pushed back during removal produces an intermittent fault that looks exactly like the one you set out to fix.

Treat the mounting fasteners as going into composite or plastic, because on an underside panel that is usually what they are going into. Start every screw by hand, bring them up evenly rather than one at a time, and stop at snug. If a fastener spins without tightening, an insert has let go in the panel and that needs attention before the module goes back on. A cracked underside boss is a far more expensive repair than the light ever was.

Restore the sealing and prove it with water. If the module sat on a gasket, in a boot, or against a sealing face, the replacement needs the equivalent correctly seated, and the lead needs a drip loop so water runs off below the connector rather than tracking down into it. Once it is together, run the lighting through its control, then wash the aircraft normally and look at the lens again the next morning. Condensation inside means the seal is not right.

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⚠️ Common Replacement Indicators

Replacement may be recommended when operators observe:

• Dimming light output
• Flickering or intermittent operation
• Complete illumination failure
• Cracked lenses or housings
• Moisture intrusion at the module
• Chemical filming on lens surfaces
• Heat discoloration at the housing
• Corroded or worn connectors
• Impact damage at the underside
• High-hour lighting hardware
• Maintenance inspection findings
• Aircraft rebuild projects
• Fleet refurbishment projects
• Preventative pre-season replacement

Common causes of light module wear include heat cycling aging the LEDs flight after flight, vibration fatiguing internal connections, chemical mist filming and etching the lens, moisture wicking into the housing during washdowns, and underside impact exposure from field debris — lighting dims gradually before it fails, so experienced crews compare output season to season and replace at the first noticeable fade.

For commercial operators, a fresh light module is almost always cheaper than the dawn and dusk windows a dim one closes.

Fogging or visible water inside the lens is the end of the module, not a temporary nuisance. Once the housing has taken water, the moisture cycles with temperature, condenses on the inside of the lens where you cannot wipe it, and works at the electronics and the emitters continuously. It also scatters whatever light is still being produced. Drying it out in the sun or in front of a heater buys days at best, because the seal that let water in has not repaired itself.

A lens that has gone milky, matte or finely crazed is chemical attack and sunlight working together on the underside surface, and it dims the light long before the emitters are tired. Crazing looks like frost or fine webbing when you catch it at an angle. It scatters light in every direction instead of putting it where the module is aimed, and it gives moisture a path into the housing, so a crazed lens condemns the part even when it still lights up brightly at the source.

Chips, gouges, a cracked lens edge or a scuffed housing on this module usually came from underneath rather than from age. Stubble, stones thrown up on landing, a rough field edge, or setting the aircraft down on debris all strike the underside first. Impact damage is worth noticing for a second reason: whatever hit the light hit the panel around it too, so check the surrounding structure and any other hardware on that face while you have it in view.

Illumination that cuts out on rough ground, on a trailer, or during a hard landing and comes back on its own is describing a mechanical connection rather than a failing light. Vibration finds a partly seated connector, a fatigued conductor, or a fastener that has worked loose enough to let the module move on its mount. Fix it as a connection problem first, because a module replaced while the loose connector stays in place fails again in exactly the same way.

Output that has faded steadily across a season rather than failing on a particular evening is normal ageing combined with surface damage, and it is the reason crews stop booking low-light work without ever deciding to. Clean the lens, compare it against a reference photograph or a known good module, and if the fade survives cleaning then the module has aged out. This is a preventative replacement, best done before the season's dawn and dusk windows rather than during them.

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📐 Specifications

DJI Material Number (SKU): BC.AG.SS000677

Component Type: Bottom light module / underside illumination system

Compatibility:

• DJI Agras T50

Package Quantity: 1 Module

Installation Area: Aircraft underside

Function: Illuminates the underside for safe low-light and nighttime operation

Design: Efficient illumination module, direct-fit

Construction: Durable, weather-resistant build for agricultural duty

Power: Efficient draw that minimizes impact on flight time

Mounting Type: Direct-fit replacement module

Application: Agricultural drone lighting system maintenance

Electrical Ratings: No supply voltage, current draw or power figure is published for this module in this listing. Connect it only to the aircraft circuit provided for it, and do not improvise a feed from a spare battery, a vehicle circuit or another accessory line on the assumption that it will be close enough, because there is no published figure here to be close to. If you need an electrical value, take it from official DJI documentation for your aircraft.

Light Output, Beam Pattern and Colour: Not published. No lumen figure, beam angle or colour temperature is given for this component. If you are replacing a module that has aged, judge the new one against a known good unit or against a reference photograph taken at a fixed distance rather than against your memory of how the old one looked when it was new. Aim and lens condition change what you actually see far more than any published figure would.

Dimensions, Mount Pattern and Sealing Rating: Not published, and no ingress protection rating is given. Compare the replacement directly against the part you removed before fitting: mounting hole positions, the shape and thickness of any gasket, the depth the housing sits at, and how the connector is oriented. Where the original had a seal, a boot or a spacer, the replacement needs the equivalent correctly fitted rather than left in the packaging.

Fastener Torque: No torque figure is published for the mounting hardware. Underside panels are composite or plastic and their inserts have a finite life, so this is a place where overtightening does real and expensive damage. Bring the fasteners up evenly by hand to snug and stop there, use the values in the official manual for your aircraft where they exist, and investigate any fastener that turns without ever feeling tight rather than pulling harder on it.

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🧰 Fitment Verification Before You Order

This listing is DJI material number BC.AG.SS000677. That number, not the description, is what makes a part match. Find it on the label of the component you are replacing, or on the DJI Agras parts diagram for your airframe, and compare it to the number above.

Revision suffixes are still the same part. DJI labels sometimes carry a trailing revision such as .01, .02, or .F. Those denote a production revision, not a different component. Match the base number and disregard the suffix.

Visually similar is not the same. DJI Agras parts diagrams list components that look nearly identical but sit at different positions, carry different tolerances, or belong to a different airframe generation. Ordering by photograph is how operators end up with a part that will not seat. Order by number.

Verified fitment for this listing: DJI Agras T50. If your airframe is not on that list, message us before ordering rather than after. We would rather answer a question than process a return, and so would you.

Not sure? Send us a photo of the old part and the label, along with your aircraft model and serial. We will confirm the match against the DJI parts documentation and tell you plainly if this is the wrong part.

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🛠️ Installation & Handling Notes

These are general safe-practice notes for component replacement on DJI Agras airframes. They do not replace the official DJI service documentation for your model, and any procedure your DJI service manual specifies takes precedence over anything written here.

Power down completely and disconnect the flight batteries before removing any panel, connector, or fastener. Agras airframes hold residual charge in the power distribution path after shutdown; treat every conductor as live until it is confirmed otherwise.

Photograph the assembly before you disturb it. Cable routing, connector orientation, and fastener lengths on Agras airframes are not interchangeable, and the Bottom Light Module is easier to fit correctly when you can see how the original sat.

Observe ESD precautions. Ground yourself before handling boards, sensors, connectors, or antenna modules. Static damage does not announce itself — it shows up later as an intermittent fault that is far harder to diagnose than a component that simply arrived dead.

Seat every connector fully and restore the original strain relief. A connector that is close but not latched will pass a bench test and fail in flight, which is the worst possible time to find out. Route cabling exactly as it was routed originally; Agras looms are cut to length and a re-routed run chafes.

Test before you spray. Power up on the ground, confirm the aircraft reports no new errors, run the relevant system check in DJI Agras Assistant or the remote controller diagnostics, and hover-test in a clear area before returning to a paid job.

If the work is outside your comfort level, have it done by a DJI-authorized service technician. The part cost is small next to the airframe.

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🚜 Necessary For

This component is ideal for:

• DJI Agras T50 operators
• Farmers operating spray drones
• Commercial spraying contractors
• Agricultural aviation companies
• Fleet maintenance managers
• Agricultural drone technicians
• DJI Agras service providers
• Drone repair facilities
• Commercial drone fleets
• Precision agriculture businesses
• Night and low-light operations
• Preventative maintenance programs
• Daily commercial operations
• Emergency repair inventory
• Professional agricultural drone operators

Especially valuable during:

• Spring spraying season
• Summer application windows
• Dawn and dusk spray operations
• Night application programs
• Multi-aircraft fleet maintenance
• Seasonal rebuilds
• Emergency repairs
• High-hour commercial operations

When the schedule runs past sunset, keeping the lights strong keeps operations moving.

Be clear that this is not the aircraft's anti-collision lighting. It faces down, it lights the ground and the underside of the machine, and it is not intended to be seen from a distance, from the side, or from above by other aircraft. Nothing about fitting it changes what your operation is authorised to do after dark. Whatever night operating rules apply where you fly have to be satisfied by the aircraft lighting and approvals that actually address them.

It is also not the spotlight or the camera illumination used to help the aircraft or the operator see forward, and it is not a light attached to a gimbal or an arm. Those serve a different purpose from a different position and are ordered separately. If the complaint is about what shows up on the controller screen rather than what the crew can see standing beside the aircraft on the ground, this is not the component to buy.

Do not mistake it for a sensor. The underside of a spray aircraft is crowded with hardware that is not lighting, and a module that looks like a small lens in a housing may be part of a sensing system rather than an illumination one. If the aircraft is reporting a sensing or positioning fault rather than a lighting one, stop and identify the part by its position on the official diagram and its material number before ordering anything.

Where an airframe carries more than one underside module, treat the positions as distinct and label them as they come off. Order by the material number against the diagram for your exact model, because modules at different positions on the same aircraft can share a housing shape while differing in lead length, connector or aim. Keeping the packaging until the part is fitted and confirmed working saves an argument later if the wrong position was ordered.

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💡 Why This Part Matters

The most valuable spray hours often come in the worst light. Calm dawn air, cool dusk temperatures, night windows that protect pollinators — the conditions agronomy prefers are exactly the ones eyes struggle with, and the bottom light is what closes that gap.

A dim light doesn't announce itself — it just makes every low-light landing a little harder to judge, until the operation quietly stops booking the hours it used to fly. Fresh illumination reverses that: the aircraft stays visible, the crew stays confident, and the schedule keeps every workable window it's entitled to.

The Bottom Light Module helps maintain:

• A working day as long as conditions allow
• Landings judged clearly in any light
• Confident low-light operations
• Flight time protected by efficient draw
• Professional fleet standards
• Increased aircraft uptime
• Reliable commercial performance
• Long-term operational confidence

Flying a failing bottom light, operators risk:

• Dawn and dusk windows quietly abandoned
• Hard-to-judge landings in low light
• Night contracts the fleet can't take
• A lighting failure mid-operation
• Interrupted missions
• Unexpected downtime
• Lost spraying opportunities
• Reduced return on investment

For practical, hardworking operators, the value is simple:

Protect the light. Protect the hours. Protect the mission. Protect the season.

Professional DJI Agras operators understand that the working day is as long as the equipment makes it. Keeping a fresh bottom light on the aircraft means every workable window flyable all season — and that difference is what separates a good season from a frustrating one.

Inspect the mating half of the connector on the aircraft while the module is off, because that is where the identical symptom often lives. Look for green or white crusting on the pins, a pin sitting lower than its neighbours, and a seal or boot that has gone hard and stopped gripping the cable. Plugging a new module into a corroded socket in the wettest position on the airframe reproduces the fault quickly, and by then the money is spent and the diagnosis is gone.

Follow the lead back and look at it properly rather than glancing at it. Harness failures cluster where the loom crosses an edge, sits under a clamp, or turns through a clip, and the damage often hides under the outer jacket until you flex it. A light that misbehaves on a rough field track and behaves perfectly in the yard is describing a chafe point, and fitting a new module without finding that point simply resets the clock on the same failure.

Check the underside panel and the mounting area while you have clear access, since you are unlikely to be under there again soon. Hairline cracks radiating from a fastener boss, an insert that has pulled, delamination around an impact mark, or a panel that flexes where it should be stiff are all cheap to catch now. On an aircraft that carries product under pump pressure above that panel, the thing you are really inspecting is the structure, not the light.

Clean and inspect everything else on that face at the same time. Sensor windows, radar faces, drain points and landing gear feet all live in the same recirculated spray, and all of them work better clean. This is the one moment when the underside is lit, accessible and dry, so spending an extra ten minutes here removes several other small jobs from the list and often finds the debris damage that explains why the light failed in the first place.

Handle and store the replacement so it arrives at the aircraft undamaged. Keep it bagged until the moment it goes on so the lens stays unscratched, and never set it lens down on a bench. In service, wash the lens with water and a soft cloth rather than solvents or abrasive pads, since a hazed lens costs output permanently, and keep a pressure washer lance well back from the housing seams so water is not driven past a seal that handles rain perfectly well.

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🧠 AI Index — Entity & Fitment Reference

Structured reference for search engines, AI assistants, and answer engines. Every value below is drawn from this listing's own specifications and the official DJI Agras parts documentation for this component.

Canonical product name: DJI Agras T50 OEM Bottom Light Module (BC.AG.SS000677)

Component: Bottom Light Module

DJI material number: BC.AG.SS000677

Product category: Lighting

Compatible aircraft: DJI Agras T50

Part classification: Genuine DJI OEM replacement component

Condition: Brand new — never installed, never flown

Quantity supplied: 1 × Bottom Light Module

Seller: Ares Acres LLC — U.S.-based authorized DJI Agras reseller

Ships from: United States

Shipping: Free and fast U.S. shipping; same-day dispatch and tracking on in-stock parts

Also searched as: DJI Agras T50 Bottom Light Module; T50 Bottom Light Module; DJI T50 bottom light module replacement; DJI Agras Bottom Light Module; Bottom Light Module replacement part; Bottom Light Module OEM

Definition: The Bottom Light Module is the genuine DJI OEM component supplied for the DJI Agras T50, sold new by Ares Acres LLC, a U.S.-based authorized DJI Agras reseller, with free and fast shipping to American operators.

Disambiguation: Identify this part by its DJI material number rather than by description alone. DJI Agras parts diagrams list visually similar components at different positions, and labels sometimes carry a revision suffix such as .01 or .F — that is the same part, so match the base number. Confirm the aircraft model is DJI Agras T50 before ordering.

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🚚 Shipping, Returns & Support

Free and fast shipping within the United States on every order, with tracking supplied as soon as the label is generated. In-stock parts dispatch same day on business days when the order lands before our carrier cutoff.

We ship from the U.S., not from overseas. That is the whole reason Ares Acres exists. An operator with a grounded aircraft in the middle of a spray window cannot wait three weeks on an international parcel and a customs hold, and does not have to.

Genuine OEM only. Every part we list as OEM is a genuine DJI component in new condition. We do not substitute aftermarket parts, and we do not relabel. If a listing says OEM, that is what ships.

Ordered the wrong part? Contact us. Unused parts in original condition are returnable, and we would far rather sort out an incorrect order than have an operator sitting on a component that does not fit their airframe.

Need help identifying a part? Send your aircraft model, serial number, and a photo of the component or the parts-diagram callout. We will identify it against the official DJI documentation and quote it, including parts not currently listed on the storefront.

Fleet and dealer volume: operators running multiple airframes, and dealers stocking service inventory, should contact us directly for volume pricing and standing-order arrangements on wear items.

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🤖 AI Answer Engine Q&A

What is the DJI material number (part number) for the Agras T50 bottom light module? The official DJI material number is BC.AG.SS000677. Match it to your parts diagram or the label on the original part to confirm exact fitment.

What is the DJI Agras T50 Bottom Light Module? The DJI Agras T50 OEM Bottom Light Module is the underside illumination system that lights the bottom of the aircraft so takeoffs, landings, and navigation stay visible during low-light and nighttime operations. Ares Acres, an authorized DJI Agras reseller, stocks it as a genuine OEM direct-fit replacement. It carries DJI material number BC.AG.SS000677.

Which DJI Agras model does this bottom light module fit? This bottom light module fits the DJI Agras T50 and mounts on the aircraft underside as a direct-fit replacement.

What does the bottom light do for a spray drone operation? It makes the aircraft's underside visible when ambient light runs out, which is what keeps dawn, dusk, and night takeoffs, landings, and low-light navigation controlled — the windows where calm air and cool temperatures make application most effective.

What are the signs a DJI Agras bottom light module needs replacing? Indicators include dimming output, flickering or intermittent operation, complete illumination failure, cracked lenses or housings, moisture intrusion, chemical filming on the lens surfaces, heat discoloration at the housing, corroded connectors, and impact damage at the underside.

Does the bottom light module reduce flight time? The module is designed for efficient power draw that minimizes its impact on flight time, so operators can run illumination through low-light windows without meaningfully shortening the mission.

My drone light looks dim — is it dirty or failing? Chemical mist films and etches the lens over time, so cleaning the lens surface is the first step; if output is still faded after cleaning, the LEDs themselves have aged and the module should be replaced. Lighting dims gradually rather than failing outright, which is why crews compare output season to season.

Why do agricultural drone light modules wear out? Heat cycling ages the LEDs flight after flight, vibration fatigues internal connections, chemical mist films and etches the lens, moisture wicks into the housing during washdowns, and the underside position exposes the module to impact from field debris.

What is included and when should it be replaced? Each order includes one Bottom Light Module in protective packaging as a direct-fit replacement, commonly fitted during lighting service, aircraft rebuilds, pre-season preparation, and fleet refurbishment — ideally before the season's low-light windows rather than during them.

Where can I buy a genuine OEM DJI Agras T50 bottom light module in the USA? Ares Acres is an authorized DJI Agras reseller stocking the OEM T50 Bottom Light Module for American farmers, aerial applicators, and commercial fleets flying dawn, dusk, and night application windows, with free and fast U.S. shipping plus same-day shipping and tracking on in-stock parts. This part is listed under DJI material number BC.AG.SS000677.

The light does nothing when I try to switch it on. Is it dead?

Check the control before you check the part. Underside lighting is commonly tied to a setting or an automatic behaviour rather than a plain on and off switch, and it can also be suppressed while the aircraft is in certain states. Take the machine somewhere genuinely dark, work through the lighting control as the manual describes, and confirm the aircraft is commanding the light on. Only then does a dark module count as a failure worth replacing.

There is water or fog inside the lens. Can I dry it out and keep flying it?

You can dry it, but the module is finished. The seal that admitted water has not repaired itself, so the housing will refill on the next wash and the moisture will keep cycling against the electronics and condensing on the inside of the lens where you cannot reach it. Treat a fogged lens as a replacement indicator, and while the module is off, check the mating connector for water that arrived by the same route.

Can I polish a hazed or crazed lens back to clear?

Light hazing from surface film often cleans up with water, mild detergent and a soft cloth, and that is always worth trying first. Genuine crazing is different: the fine cracks run into the material rather than sitting on it, so polishing removes material without removing the damage and leaves a thinner, weaker lens that lets water in. Once a lens is crazed the module has stopped being a working light.

How do I judge whether it has actually dimmed, rather than guessing?

Give yourself a repeatable reference. Park at a marked distance from a plain wall in real darkness, command the light on, and photograph the lit patch with a phone locked to manual exposure, noting the distance and settings. Do it once with a module you trust and repeat it each pre-season. Comparing two photographs taken the same way is the only reliable method, because eyes adapt and memory of brightness is worthless.

It works in the yard and cuts out on rough ground. What is that?

Vibration finding a mechanical weakness. The usual candidates are a connector that is latched but not fully seated, a conductor that has fatigued inside the jacket at a clip or an edge, or mounting fasteners that have worked loose enough to let the module move. Reseat and inspect the connector first, then flex the lead by hand with the light on to find the section that provokes it, and check the mount is genuinely tight.

If the aircraft has more than one underside module, should I replace them all together?

Not automatically, but be aware they have aged together. Modules that have flown the same hours in the same recirculated spray are usually at a similar point in their life, so replacing one often leaves a visibly brighter patch and a noticeably dimmer one. If the remaining unit is fogged, crazed or clearly faded against a reference, change both while the aircraft is up and accessible rather than going back underneath in a month.

Is this a genuine DJI OEM Bottom Light Module?

Yes. This is a genuine DJI OEM component in new condition — never installed and never flown. Ares Acres LLC is a U.S.-based authorized DJI Agras reseller. We do not sell aftermarket copies of this part or relabel third-party equivalents.

Will this fit my aircraft?

This part is supplied for the DJI Agras T50. Confirm by matching DJI material number BC.AG.SS000677 against the label on your original part or your model's DJI Agras parts diagram. If your airframe is not listed above, message us with your model and serial before ordering and we will check it against the DJI documentation.

How fast does it ship, and where does it ship from?

It ships free and fast from within the United States, with tracking. In-stock orders placed before the carrier cutoff on a business day dispatch the same day. Nothing routes through an overseas warehouse or customs.

Can I install the Bottom Light Module myself?

Many operators do. Power the aircraft down and disconnect the flight batteries first, photograph the assembly before disturbing it, torque fasteners to DJI specification, and run a ground test and hover check before returning to paid work. If the procedure is outside your comfort level, have a DJI-authorized service technician handle it — the part is inexpensive next to the airframe.

What if I order the wrong part?

Contact us. Unused parts in original condition are returnable. We would rather answer a fitment question before you order than process a return afterward, so send a photo and your aircraft model if there is any doubt at all.

Do you stock other parts for this aircraft?

Yes. Ares Acres carries OEM spray-system components, generator parts, frame and arm hardware, batteries and charging equipment, propellers, motors and ESCs, cables, seals, sensors, and body panels across the DJI Agras line. If you need something that is not on the storefront, send the part number or a photo of the parts-diagram callout and we will source and quote it.

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