4.3 Inch 50W Agricultural Forestry Industrial LED Work Light EMC CISPR25 CLASS4 SLL-4050
The SLL-4050 is a 4.3 inch industrial LED work light designed for agricultural and forestry machinery that operates in dusty, wet, and high-vibration environments. Five 10W CREE LEDs deliver 4000 effective lumens with a spot or flood beam option, providing clear illumination across the work zone on tractors, harvesters, and forestry cutters. The IP68 sealing and 9-32V DC operation ensure reliable performance in extreme conditions, while EMC protection to CISPR25 Class 4 prevents interference with vehicle electronics.
- 50W nominal power with 4000 effective lumens from five 10W CREE LEDs, delivering bright, even illumination
- IP68 sealing and a robust cable gland prevent water and dust ingress during field use and pressure washing
- EMC protection to CISPR25 Class 4 ensures no interference with vehicle control systems
- 9-32V DC input range supports both 12V and 24V systems, reducing SKU count for fleet operators
- Spot or flood beam options allow matching the light to the task—distance or area coverage
Where This Lamp Is Used
- Front and side work lighting on tractors and harvesters during night field operations
- Cab and hood lighting on forestry cutters and wood chippers in high-dust environments
- Auxiliary lighting on agricultural sprayers where vibration and moisture degrade standard lamps
- Machine-mounted lighting on utility vehicles used in remote forestry or farming zones
- Replacement for halogen lamps on machinery where electrical noise from the lamp disrupts sensors
Who It Is For
- Distributors of industrial vehicle lighting needing one part number for 12V and 24V fleets
- Agricultural and forestry equipment OEMs integrating lighting into production line builds
- Fleet operators replacing halogen lamps that fail under vibration and moisture
- 4x4 and industrial accessory brands developing a private label work light range
- Machinery dealers fitting lighting on used or refurbished equipment for resale
Problems It Solves
- Halogen work lamps burn out quickly under vibration and draw excessive current from the vehicle’s electrical system
- Cheap sealed lamps allow water in through the cable entry, leading to fogging and short circuits after a few wash cycles
- Unshielded LED lights generate electromagnetic interference that disrupts vehicle sensors and control units
- Narrow spot beams leave the near work area dark, while wide flood beams lack reach for distant targets
- Lamps with limited voltage tolerance fail when voltage spikes occur during engine start-up or alternator surges
Technical Features
- Five 10W CREE LEDs with a nominal power draw of 50W and a real output of 4000 effective lumens
- Beam pattern available as spot or flood, tailored to the machine’s operational needs
- Anti-scratch polycarbonate lens over a die-cast aluminium heat sink for thermal management
- Semi-gloss black powder coating on the full housing and bracket for corrosion resistance
- Bare wire lead of 40cm as standard, with Deutsch connector available on request
- EMC protection to CISPR25 Class 4 for compatibility with vehicle electronics
- Operating voltage range of 9 to 32V DC, suitable for 12V and 24V systems
- Rated for -40 to +60 degrees Celsius, ensuring performance in extreme climates
- IP68 sealing with a sealed cable entry gland to prevent ingress of water and dust
Technical Specification
Values taken from the original factory specification for this model. Fields the factory sheet does not state are left out rather than estimated.
| Part Number | SLL-4050 |
|---|---|
| Max Power | 50W |
| LED | 5 pcs x 10W CREE |
| Effective Lumen | 4000 lm |
| Beam Pattern | Spot or Flood (optional) |
| Colour Temperature | 6000K |
| Operating Voltage | 9-32V DC |
| Housing Material | Die-cast aluminium, semi-gloss black powder coating |
| Lens Material | Anti-scratch polycarbonate |
| Waterproof Rating | IP68 |
| Operating Temperature | -40 to +60 degrees Celsius |
| Electrical Connection | Bare wire 40cm, Deutsch connector available |
| Lifetime | More than 50000 hours |
| Certification | CE, RoHS, EMC, CISPR25 Class 4 |
Materials Used
- Die-cast aluminium housing and heat sink
- Anti-scratch UV resistant polycarbonate lens
- Silicone rubber gasket and sealed cable entry gland
- Semi-gloss black powder coating on housing and bracket
How This Lamp Is Built
Die casting of the aluminium housing and heat sink
Powder coating in semi-gloss black
LED board assembly with CREE emitters
Lens bonding and gasket sealing
Quality Control on This Model
- Photometric output verified in an integrating sphere
- Sealing verified against the IP68 rating before shipment
- Vibration testing on a vibration test machine to simulate machine-mounted service
- Salt spray corrosion testing on housing coating and stainless bracket
- High and low temperature alternating humidity testing across the -40 to +60 degrees Celsius window
- EMC testing to CISPR25 Class 4 compliance
Customisation Options
- Spot beam or flood beam optics selected at order time
- Deutsch DT connector instead of the standard 40cm bare wire lead
- Private label logo on the housing and printed carton
- Alternative cable length to match a specific machine harness
- Mixed cartons combining this lamp with other SUNLITEC models for trial orders
How It Compares With the Alternatives
| Round 4.3 inch work lamp | The square body provides more LED area behind the same mounting footprint but requires a flat surface for the bottom bracket |
|---|---|
| Spot beam version of the same lamp | Flood covers the near working area evenly while spot reaches further ahead but leaves the machine edges dark |
| Larger 5 inch work lamp | Lower output but fits tight spaces like cab pillars and guard rails where a larger body would not clear |
How to Fit and Use It
- Leave a drip loop in the 40cm lead so water runs away from the gland rather than into it
- Select spot or flood beam based on the task—distance or area coverage—before installation
- Clean the PC lens with water and a soft cloth only, as solvents will degrade the anti-scratch coating
Questions About This Model
Can I order a sample before placing a bulk order
Yes. Sample orders are welcome and mixed samples of different models in one shipment are accepted.
What is the lead time
Sample orders normally take around 3 to 7 working days. Bulk lead time depends on the model and the quantity ordered.
Do you have a minimum order quantity
There is an MOQ for standard orders, but smaller orders are also accepted, which suits distributors testing a new model.
How is the lamp shipped
Samples usually go by DHL, UPS, FedEx or TNT in around 4 to 7 days. Bulk orders ship by air in about 7 to 15 days or by sea in about 15 to 30 days.
Will this lamp work on both 12V and 24V machines
Yes. The operating range is 9 to 32V DC, so the same part number can be fitted to 12V and 24V vehicles.
Can you supply the lamp with our own brand
Yes. OEM and ODM service is available, including a private label logo on the housing and printed cartons.
Is it approved for use on vehicles with sensitive electronics
Yes. The lamp is EMC protected to CISPR25 Class 4, which ensures compatibility with vehicle control systems and sensors.
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