4 Inch 40W Industrial LED Work Light EMC CISPR 25 CLASS 4
The SLL-4407 is a 4 inch industrial LED work light designed for machines operating in harsh environments where electrical noise, extreme temperatures, and dust or water ingress can disrupt lighting performance. Four 10W Osram LEDs deliver 3,100 effective lumens in a flood beam pattern, providing consistent illumination across the work zone without hot spots. The die-cast aluminium housing with UV-resistant polyester powder coating and IP68 sealing ensures long-term durability under vibration, pressure washing, and exposure to salt or chemicals. The lamp is EMC compliant to CISPR 25 Class 4, which prevents interference with vehicle electronics during operation.
- EMC CISPR 25 Class 4 compliance ensures no electrical interference with vehicle control systems, critical on modern machinery with sensitive electronics
- IP68 sealing and a durable polycarbonate lens prevent water and dust ingress, even during high-pressure washing or prolonged exposure to rain
- Operating range of 9 to 32V DC covers both 12V and 24V systems, reducing the need for multiple SKUs across fleets
- Overvoltage and overheat protection extend lamp life in unstable electrical environments common on heavy machinery
- 50,000 hour lifespan reduces replacement frequency and maintenance downtime on machines running continuous shifts
Where This Lamp Is Used
- Front and side work lighting on excavators and cranes operating in dusty or wet construction zones
- Cab and boom lighting on mining machinery exposed to vibration, dust, and temperature extremes
- Auxiliary lighting on service trucks and utility vehicles where electrical noise from alternators or inverters can disrupt other systems
- Night operation lighting on forklifts and engineering vehicles in warehouses with high humidity or frequent washdowns
- Lighting on off-road vehicles and agricultural machinery where electrical interference from engine control units must be avoided
Who It Is For
- Machinery OEMs integrating lighting into new production lines and needing EMC-certified components
- Fleet operators managing 12V and 24V vehicles who want a single part number for mixed voltage fleets
- Distributors sourcing industrial-grade LED work lights with proven electromagnetic compatibility
- Equipment dealers fitting lighting on machines that must pass electrical safety checks in regulated markets
- 4x4 accessory brands building private label work lights with robust protection against environmental stress
Problems It Solves
- Cheap LED lights without EMC protection can cause malfunctions in vehicle ECUs, leading to diagnostic trouble codes or system shutdowns
- Standard sealed lamps fail under vibration or pressure washing due to poor cable gland sealing or weak lens bonding
- Lamps with narrow beam patterns leave the immediate work area dark, increasing operator error and safety risk
- Low-lifespan lamps require frequent replacement, increasing downtime and maintenance costs on machines in continuous use
- Painted surfaces on brackets or housings degrade quickly under UV exposure or chemical wash, leading to corrosion and failure
Technical Features
- Four 10W Osram LEDs with a real power draw of 40W and a maximum rating of 40W
- Flood beam pattern with 3,100 effective lumens output
- Semi-gloss black durable UV polyester powder coating over the full housing and bracket
- Bare wire lead of 40cm as standard with options for Deutsch connector or custom length on request
- Overvoltage and overheat protection circuits integrated into the driver
- EMC protected wiring and an operating window of -40 to +85 degrees Celsius
- IP68 sealing with a sealed cable entry gland and silicone rubber gasket
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-4407 |
|---|---|
| Max Power | 40W |
| Real Power | 40W |
| LED | 4 pcs x 10W Osram |
| Beam Pattern | Flood |
| Colour Temperature | 6000K |
| Operating Voltage | 9-32V DC |
| Lens Material | Anti-reflective UV-resistant PC |
| Waterproof Rating | IP68 |
| Operating Temperature | -40 to +85 degrees Celsius |
| Electrical Connection | Bare wire 40cm, Deutsch connector available |
| Certification | CE, RoHS, EMC, CISPR 25 Class 4 |
Materials Used
- Anti-reflective UV-resistant polycarbonate lens
- Silicone rubber gasket and sealed cable entry gland
- UV-resistant polyester powder coating
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 Osram emitters and integrated protection circuits
Lens bonding and gasket sealing for IP68 integrity
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 confirm CISPR 25 Class 4 compliance
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 a specific machine harness
- Mixed cartons combining this lamp with other SUNLITEC models for trial orders
How It Compares With the Alternatives
| Standard LED work lamp without EMC protection | May cause interference with vehicle ECUs or diagnostic systems, leading to operational issues on modern machinery |
|---|---|
| Round 4 inch work lamp | The square body allows 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 6 inch work lamp | Lower output but fits guard rails and cab pillars 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
- Aim the flood beam at the working area close to the machine and use a spot lamp separately for distance
- Clean the PC lens with water and a soft cloth only, since solvents will degrade the anti-reflective 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 compliance to CISPR 25 Class 4, which is required for electronic compatibility on vehicles used on public roads.
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