5 Inch 40W Utility LED Work Light EMC CISPR25 CLASS 4
The SLL-5040 is a 5 inch utility LED work light designed for machines operating in extreme conditions across agriculture, forestry, mining, roadwork and construction. It delivers 3,200 effective lumens from four 10W CREE LEDs, maintaining consistent output under voltage fluctuations from 9 to 32V DC. The die-cast aluminium housing with UV resistant polyester powder coating and IP68 sealing ensures long-term durability in dust, rain and high vibration environments. EMC protection to CISPR25 Class 4 prevents electrical interference with vehicle control systems, a critical requirement on modern machinery.
- 3,200 effective lumens from four 10W CREE LEDs provide even illumination across wide work zones
- IP68 sealing and a durable polycarbonate lens resist water, dust and impact in harsh outdoor conditions
- EMC protection to CISPR25 Class 4 ensures no interference with vehicle electronics during operation
- Operates reliably from 9 to 32V DC, covering 12V and 24V systems without voltage regulation
- Overvoltage and overheat protection extend service life under unstable electrical conditions
Where This Lamp Is Used
- Front and side work lighting on agricultural tractors and harvesters operating at night
- Auxiliary lighting on mining haul trucks and loaders exposed to dust, vibration and moisture
- Construction site lighting on excavators and backhoe loaders where electrical stability is poor
- Roadwork vehicle lighting on maintenance trucks with sensitive onboard control systems
- Forklift and material handling equipment lighting in warehouses with high ambient vibration
Who It Is For
- Machinery OEMs integrating lighting into new machine builds with strict EMC requirements
- Fleet operators replacing halogen lights that fail under voltage spikes and vibration
- Distributors sourcing a single model that works across 12V and 24V vehicle platforms
- 4x4 accessory brands building a private label utility light range with proven EMC compliance
- Equipment dealers fitting lighting on machines used in mining and forestry where dust and water ingress are common
Problems It Solves
- Halogen work lights fail early under vibration and draw excessive current from vehicle alternators
- Cheap LED lights without EMC protection cause interference with vehicle ECUs and sensors
- Lights with poor sealing let water in during pressure washing or heavy rain, leading to short circuits
- Narrow beam lights leave the near working area dark, while wide beams without effective lumen output are ineffective
- Lights with low voltage tolerance shut off during engine start or alternator surges on older machines
Technical Features
- Four 10W CREE LEDs with a real power draw of 40W and a maximum rating of 40W
- Flood or spot beam options available to match different work zone needs
- Semi-gloss black UV resistant polyester powder coating on the full housing
- Bare wire lead of 40cm as standard with Deutsch connector available on request
- Overvoltage and overheat protection circuits built into the driver module
- Operating window of -40 to +85 degrees Celsius for extreme cold and hot environments
- EMC protection compliant with CISPR25 Class 4 for interference immunity and emission control
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-5040 |
|---|---|
| Max Power | 40W |
| Real Power | 40W |
| LED | 4 pcs x 10W CREE |
| Beam Pattern | Flood or Spot (optional) |
| Colour Temperature | 6000K |
| Operating Voltage | 9 – 32V DC |
| Lens Material | Anti-scratch, UV resistant polycarbonate |
| Waterproof Rating | IP68 |
| Operating Temperature | -40 to +85 degrees Celsius |
| Electrical Connection | Bare wire 40cm, Deutsch connector available |
| Certification | CE, RoHS, EMC, CISPR25 Class 4 |
Materials Used
- Anti-scratch, UV resistant polycarbonate lens
- Silicone rubber gasket and sealed cable entry gland
- UV resistant polyester 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 with UV resistance
LED board assembly with CREE emitters and driver module
Lens bonding and gasket sealing with silicone
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 +85 degrees Celsius range
- EMC testing to CISPR25 Class 4 compliance in a shielded chamber
Customisation Options
- Deutsch DT connector instead of the standard 40cm bare wire lead
- Spot beam optics in place of the flood pattern
- Private label logo on the housing and printed carton
- Alternative cable length for integration with specific machine harnesses
- Mixed cartons combining this lamp with other SUNLITEC models for trial orders
How It Compares With the Alternatives
| Round 5 inch work lamp | The square body fits the same mounting footprint but provides more LED area and better heat dissipation |
|---|---|
| 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 6 inch work lamp | Lower output but fits tight spaces like cab pillars and guard rails where a 6 inch body will 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 flood beam for near zone illumination and spot beam for distance; use a separate lamp for long-range visibility
- 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 road going machines
The lamp is CE and RoHS compliant and carries EMC protection to CISPR25 Class 4, which is required for interference control on vehicles used on public roads.
Get a Price on 5 Inch 40W Utility LED Work Light EMC CISPR25 CL
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