5 Inch 27W Industrial LED Work Light EMC CISPR 25 CLASS 4
The SLL-5451-27 is a 5 inch industrial LED work light designed for machines that operate in extreme conditions and require reliable lighting without electrical interference. Nine 3W Osram LEDs deliver 2160 effective lumens in a flood beam pattern, providing even illumination across the work zone on excavators, forklifts, and engineering vehicles. The die-cast aluminium housing with UV resistant powder coating and IP68 sealing ensures long-term performance in dust, rain, and vibration. EMC protection to CISPR 25 Class 4 prevents signal disruption in sensitive vehicle electronics, which is critical for modern machinery with digital control systems.
- 2160 effective lumens in a flood beam pattern evenly lights the immediate work area without hot spots
- CISPR 25 Class 4 EMC protection prevents interference with vehicle control units and sensors
- IP68 sealing and a durable polycarbonate lens resist water, dust, and impact during heavy use
- 9 to 32V DC operation covers both 12V and 24V systems, reducing the number of SKUs needed
- Overvoltage and overheat protection extend service life in unstable electrical environments
Where This Lamp Is Used
- Front and side work lighting on excavators and loaders operating in night shifts
- Cab and boom lighting on forklifts used in warehouses with high humidity and dust
- Auxiliary lighting on engineering vehicles with sensitive electronic systems
- Rear and side lighting on service trucks where electrical noise from other devices is a concern
- Lighting on mining and construction machinery exposed to vibration, dust, and temperature extremes
Who It Is For
- Machinery OEMs integrating work lights into production line builds with strict EMC requirements
- Fleet operators replacing halogen lights that cause electrical interference in modern vehicles
- Distributors sourcing lights for industrial machines where reliability and compliance are mandatory
- 4x4 accessory brands building private label work lights for off-road vehicles with digital dashboards
- Equipment dealers fitting lights on machines used in harsh environments with high vibration
Problems It Solves
- Halogen work lights generate electromagnetic noise that disrupts vehicle sensors and control units
- Cheap LED lights without EMC protection fail CISPR 25 compliance and cannot be used on modern machines
- Lights with poor sealing let water in during pressure washing, leading to short circuits and early failure
- Narrow beam lights leave the edges of the work area dark, increasing the risk of accidents
- Lights not rated for 32V DC can fail during voltage spikes in 24V systems, especially during engine start
Technical Features
- Nine 3W Osram LEDs with a total real power draw of 27W and a maximum rating of 30W
- Flood beam pattern with 2160 effective lumens and a 1 lux reading at 45 meters
- Semi-gloss black durable UV polyester powder coating over the full housing
- Bare wire lead of 40cm as standard with Deutsch connector available on request
- Overvoltage and overheat protection circuits to prevent damage from electrical surges
- Operating range of 9 to 32V DC, compatible with 12V and 24V systems
- EMC protection to CISPR 25 Class 4, ensuring no interference with vehicle electronics
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-5451-27 |
|---|---|
| Real Power | 27W |
| LED | 9 pcs x 3W Osram |
| Beam Pattern | Flood |
| 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 CISPR 25 Class 4, IP68 |
Materials Used
- Anti-scratch UV resistant polycarbonate lens
- Silicone rubber gasket and sealed cable entry gland
- Semi-gloss black UV 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 overvoltage/overheat protection
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 window
- EMC testing to CISPR 25 Class 4 compliance using 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 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 light without EMC protection | This model meets CISPR 25 Class 4, so it will not disrupt vehicle electronics, unlike untested lights |
|---|---|
| Flood beam version with lower voltage range | This lamp operates from 9 to 32V DC, covering both 12V and 24V systems, while others may fail above 24V |
| Round 5 inch work light | The square body allows more LED area behind the same mounting footprint but requires a flat surface for the bracket |
| Larger 6 inch work lamp | Lower output but fits in tight spaces like cab pillars and guard rails where a 6 inch body cannot clear |
How to Fit and Use It
- Mount on a flat surface using the bottom bracket and verify the 45mm bracket width matches the machine bracket before drilling
- 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 immediate work zone and use a spot lamp separately for long-distance visibility
- Clean the PC lens with water and a soft cloth only—solvents will damage 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 machines with sensitive electronics
Yes. The lamp is EMC protected to CISPR 25 Class 4, which ensures no interference with vehicle control systems.
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