Offroad Free Form Reflector LED Light Bar with DRL EMC CISPR 25 CLASS 4
The SLL-21X DI is a free form reflector LED light bar designed for off-road vehicles and heavy machinery that operate in extreme conditions and require reliable auxiliary lighting with integrated daytime running light and turn signal functions. The light bar uses a combination of 10W, 5W, and 1W Osram LEDs to deliver a focused beam pattern with high lumen output, while the die-cast aluminium housing and IP68 sealing ensure durability in dust, water, and vibration. It is EMC compliant to CISPR 25 Class 4, which prevents electrical interference with vehicle electronics during operation.
- Free form reflector design allows custom beam shaping for spot, flood, or combo patterns without sacrificing light output
- Integrated DRL and turn signal functions reduce the number of separate lights needed on off-road vehicles
- EMC CISPR 25 Class 4 compliance ensures no interference with vehicle control systems during operation
- IP68 sealing and durable UV polyester powder coating resist water, dust, and UV degradation in harsh environments
- Overvoltage and overheat protection prevent damage from electrical surges and prolonged high-temperature use
Where This Lamp Is Used
- Front lighting on off-road vehicles and ATVs used in mining, forestry, and construction where visibility is critical in low light
- Auxiliary lighting on cranes and excavators operating at night in remote or poorly lit sites
- Daytime running light and turn signal integration on fleet vehicles used in rugged terrain
- Lighting on engineering vehicles and utility trucks where electrical interference must be avoided
- Mounting on the roof or hood of a 4x4 vehicle where a single light bar must serve multiple functions
Who It Is For
- Machinery OEMs fitting integrated lighting systems on production line vehicles
- Distributors of off-road vehicle accessories needing a multi-functional light bar with DRL and turn signal
- Fleet operators upgrading from halogen or basic LED bars to a system with EMC protection
- 4x4 accessory brands developing a private label light bar with advanced electrical compatibility
- Equipment dealers fitting lighting on machines that must pass electrical safety checks in export markets
Problems It Solves
- Basic LED light bars without EMC protection can cause interference with vehicle ECUs, leading to error codes or system failures
- Lack of DRL and turn signal integration forces buyers to install multiple lights, increasing cost and complexity
- Standard reflector designs limit beam pattern flexibility, making it hard to match specific vehicle needs
- Light bars with poor sealing or coating fail quickly in dusty, wet, or UV-exposed environments
- Voltage spikes in 12V and 24V systems can damage unprotected LED drivers, leading to premature failure
Technical Features
- Free form reflector design supports spot, flood, or combo beam patterns
- Die-cast aluminium housing with durable UV polyester powder coating for long-term outdoor use
- Anti-UV, impact-resistant polycarbonate lens with high light transmission
- Overvoltage and overheat protection built into the driver circuit
- EMC protected to CISPR 25 Class 4, ensuring no interference with vehicle electronics
- IP68 sealing rated for continuous submersion in water and dust ingress protection
- Operating voltage range of 9–32V DC, compatible with 12V and 24V systems
- Operating temperature range of -40 to +85 degrees Celsius
- Rated lifespan of more than 50,000 hours
- Mounting options include side, top, or front bracketing with standard hardware
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 DI |
|---|---|
| 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 |
| Housing Material | Die-cast aluminium |
| Lens Material | Polycarbonate |
| Coating | UV polyester powder coating |
| Protection | Overvoltage, Overheat |
| Mounting | Side, top, or front bracketing with standard hardware |
Materials Used
- Die-cast aluminium housing
- UV polyester powder coating
- Anti-UV polycarbonate lens
- Osram 10W, 5W, and 1W LEDs
- Internal overvoltage and overheat protection circuitry
- Sealed cable entry with rubber gasket
How This Lamp Is Built
Die casting of the aluminium housing and heat sink
Powder coating with UV polyester finish
LED board assembly with Osram emitters and driver circuit
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 off-road conditions
- Salt spray corrosion testing on the housing and coating
- 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
- Choice of beam pattern: spot, flood, or combo
- Private label logo on the housing and carton
- Alternative cable length or connector type (e.g. Deutsch DT)
- Custom mounting bracket configuration for specific vehicle models
- 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 and turn signal | This model integrates both functions, reducing the need for separate lights and simplifying wiring |
|---|---|
| LED light bar without EMC protection | CISPR 25 Class 4 compliance prevents electrical interference with vehicle systems, avoiding diagnostic errors |
| Round or standard reflector light bar | Free form reflector allows better beam shaping and light distribution for specific vehicle needs |
| Light bar with lower IP rating | IP68 sealing ensures operation in full submersion and dust-heavy environments |
| Light bar with standard powder coating | UV polyester coating resists fading and cracking under prolonged sun exposure |
How to Fit and Use It
- Mount the light bar on a flat surface using the standard bracket, ensuring the mounting holes align with the vehicle's structure
- Use a drip loop in the cable to prevent water from entering the gland during rain or washing
- Select the beam pattern (spot, flood, or combo) based on the primary use case—distance, area coverage, or both
- Avoid direct contact with the lens during installation to prevent scratches; clean only with a soft cloth and water
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 light bar 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.
Is the light bar compatible with 12V and 24V systems
Yes. The operating range is 9–32V DC, so the same part number works 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 the light bar approved for use on vehicles with electronic systems
Yes. The light bar is EMC compliant to CISPR 25 Class 4, which ensures it will not interfere with vehicle electronics.
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