Offroad Free Form Reflector LED Light Bar with DRL EMC CISPR 25 CLASS 4 Version 2
The SLL-21X is an offroad free form reflector LED light bar designed for vehicles that operate in extreme conditions and require reliable auxiliary lighting with integrated daytime running light and turn signal functions. It uses a combination of 10W, 5W, and 1W Osram LEDs to deliver a consistent beam pattern across spot, flood, or combo configurations, with an operating range of 9 to 32V DC to match both 12V and 24V systems. The die-cast aluminium housing and polycarbonate lens are rated IP68 for full waterproof and dustproof protection, while the EMC CISPR 25 Class 4 certification ensures it does not interfere with vehicle electronics during operation.
- Free form reflector design allows precise beam shaping for spot, flood, or combo patterns without hot spots or dark zones
- Integrated DRL and turn signal functions reduce the need for separate lamps, simplifying wiring and reducing part count
- EMC CISPR 25 Class 4 compliance prevents electromagnetic interference with vehicle control systems
- IP68 sealing and durable UV polyester powder coating resist water, dust, and UV degradation in harsh offroad environments
- Overvoltage and overheat protection extend lifespan and prevent damage from electrical surges or high ambient temperatures
Where This Lamp Is Used
- Front lighting on off-road vehicles and 4x4s operating in remote areas with no street lighting
- Auxiliary lighting on cranes and excavators where consistent beam control is needed during night shifts
- Fleet vehicles used in mining or construction that require DRL and turn signal integration without additional modules
- Trucks and buses operating in high-vibration environments where standard sealed lights fail prematurely
- Engineering vehicles used in cold climates where operation at -40°C is required without performance drop
Who It Is For
- Distributors of offroad and industrial vehicle lighting needing a single model with multiple beam options
- Machinery OEMs fitting light bars on production lines where EMC compliance is mandatory
- Fleet operators replacing halogen or basic LED bars that lack DRL and turn signal functions
- 4x4 accessory brands building a private label range with integrated safety features
- Equipment dealers supplying lighting for machines used in mining, agriculture, and utility sectors
Problems It Solves
- Basic LED light bars lack DRL and turn signal functions, requiring separate units and increasing wiring complexity
- Standard reflector designs create uneven beam patterns with hot spots or dark edges in the working area
- Poor EMC shielding causes interference with vehicle CAN bus systems, leading to error messages or system failures
- Light bars with low IP ratings fail after exposure to rain, dust, or pressure washing during maintenance
- Lack of overvoltage and overheat protection leads to premature failure in high-vibration or high-temperature environments
Technical Features
- Free form reflector design supports spot, flood, or combo beam patterns with consistent light distribution
- EMC CISPR 25 Class 4 compliant to prevent interference with vehicle electronics
- Durable UV polyester powder coating resists fading and chalking under prolonged sunlight exposure
- Die-cast aluminium housing with heat dissipation fins for stable thermal performance
- Polycarbonate lens with anti-reflective coating and impact resistance for high-visibility operation
- Overvoltage protection circuit prevents damage from voltage spikes in 12V or 24V systems
- Overheat protection shuts down the lamp if internal temperature exceeds safe limits
- Operating voltage range of 9 to 32V DC covers both 12V and 24V vehicle systems
- Operating temperature range of -40 to +85 degrees Celsius ensures reliable function in extreme climates
- IP68 sealing prevents water and dust ingress even under continuous immersion or high-pressure wash
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-21X |
|---|---|
| LED | 10W + 5W + 1W Osram |
| Beam Pattern | Spot, Flood, Combo (optional) |
| Colour Temperature | 6000K |
| Operating Voltage | 9–32V DC |
| Operating Temperature | -40 to +85 degrees Celsius |
| Waterproof Rating | IP68 |
| EMC Compliance | CISPR 25 Class 4 |
| Protection | Overvoltage, Overheat |
| Housing Material | Die-cast aluminium |
| Lens Material | Durable polycarbonate |
| Coating | UV polyester powder coating |
| Mounting | Standard mounting holes, compatible with standard brackets |
Materials Used
- Die-cast aluminium housing with heat dissipation fins
- Durable polycarbonate lens with anti-reflective coating
- UV polyester powder coating for exterior protection
- Osram 10W, 5W, and 1W LEDs with high lumen output and stable colour
- Internal circuit board with overvoltage and overheat protection components
- Silicone gasket and sealed cable entry for IP68 integrity
How This Lamp Is Built
Die casting of the aluminium housing and heat sink
Powder coating with UV polyester finish in a controlled environment
LED board assembly using Osram emitters and precision reflector alignment
Lens bonding with UV-resistant adhesive and gasket sealing
Quality Control on This Model
- Photometric output verified in an integrating sphere for beam consistency
- Sealing tested to IP68 standard under pressure and immersion
- EMC testing performed to CISPR 25 Class 4 requirements
- Vibration testing on a vibration test machine to simulate offroad conditions
- High and low temperature alternating humidity testing across the -40 to +85 degrees Celsius range
Customisation Options
- Choice of beam pattern: spot, flood, or combo, selected at time of order
- Deutsch or other connector types instead of standard bare wire lead
- Private label logo on the housing and printed carton
- Alternative cable length to match specific vehicle harnesses
- Mixed cartons combining this light bar with other SUNLITEC models for trial orders
How It Compares With the Alternatives
| Standard LED light bar without DRL or turn signal | This model integrates both functions, reducing the need for separate units and simplifying wiring |
|---|---|
| Round reflector light bar | The free form reflector allows more precise beam shaping and better light distribution across the target area |
| Light bar without EMC protection | CISPR 25 Class 4 compliance ensures no interference with vehicle electronics, avoiding system errors |
| Light bar with lower IP rating | IP68 sealing ensures operation in full immersion or high-pressure wash environments |
| Light bar with fixed beam pattern | Free form reflector allows beam selection at time of order, increasing versatility across applications |
How to Fit and Use It
- Mount on a flat surface using standard mounting holes and ensure the bracket matches the vehicle's mounting pattern
- Keep the cable entry pointing downward to prevent water ingress, and leave a drip loop in the cable
- Select the desired beam pattern (spot, flood, or combo) during installation based on the intended use
- Avoid direct exposure to solvents or abrasives when cleaning the polycarbonate lens; use water and a soft cloth only
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 light bar work on both 12V and 24V systems
Yes. The operating range is 9 to 32V DC, so the same part number can be used on both 12V and 24V vehicles.
Can you supply the light bar 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 public roads
The light bar is CE and RoHS compliant, with EMC CISPR 25 Class 4 certification, which supports road use in markets requiring electromagnetic compatibility standards.
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