Sunlitec 18W 36W 54W 72W 90W 108W 126W 144W 198W 234W 288W Classic Double CREE Light Bar with Anti-frog Design SLL-3400 Series
The SLL-3400 Series is a classic double light bar designed for off-road and industrial vehicles that operate in extreme conditions. It uses high-intensity USA XBD CREE LEDs to deliver consistent light output across 11 power variants from 18W to 288W. The anti-frog design prevents water accumulation in the lens cavity, reducing fogging during temperature shifts. The die-cast aluminium body and UV-resistant imported PC lens ensure durability under prolonged exposure to sunlight and vibration. CE and RoHS compliance confirm it meets international electrical and environmental standards.
- 11 power variants from 18W to 288W allow one model series to cover multiple vehicle lighting needs
- Anti-frog design prevents condensation buildup in the lens cavity during rapid temperature changes
- High-intensity USA XBD CREE LEDs deliver 100 lumens per watt with a 6000K white colour temperature
- Die-cast aluminium body with UV-resistant PC lens resists cracking, yellowing and impact
- 10-30V DC input supports both 12V and 24V vehicle systems without changing part numbers
Where This Lamp Is Used
- Front and side lighting on 4x4 vehicles and ATVs operating in off-road terrain with frequent rain and dust
- Work lighting on excavators and mining trucks where vibration and temperature extremes degrade standard lights
- Auxiliary lighting on fire engines and rescue vehicles that must operate reliably during emergency response
- Trailer and transport vehicle lighting where a single light bar must serve multiple vehicle types
- Marine and boat lighting where salt spray and humidity accelerate corrosion and fogging
Who It Is For
- Distributors sourcing LED light bars in multiple wattages for resale across different vehicle segments
- Machinery OEMs integrating a single light bar series into multiple machine models with different power needs
- Fleet operators replacing halogen or low-lumen LED bars that fail under vibration or fog up in cold starts
- 4x4 accessory brands building a private label range with consistent beam patterns and mounting
- Equipment dealers fitting lighting on trailers, cranes and utility vehicles where long-term reliability is critical
Problems It Solves
- Fogging in sealed light bars caused by temperature cycling leads to reduced visibility and failed inspections
- Inconsistent beam patterns across different wattage models force distributors to stock multiple SKUs
- Low lumen output per watt from generic LEDs increases power draw and alternator load on 12V systems
- Poor heat dissipation in plastic or thin metal housings shortens LED lifespan in continuous duty
- Lack of voltage tolerance in low-cost light bars causes failure when voltage spikes occur during engine start
Technical Features
- 11 power variants: 18W, 36W, 54W, 72W, 90W, 108W, 126W, 144W, 198W, 234W, 288W using 3W CREE LEDs
- High-intensity USA XBD CREE LEDs with 100 lumens per watt efficiency and 6000K white colour temperature
- Beam patterns available as Spot, Flood, or Combo to match specific vehicle lighting needs
- Anti-frog design with internal venting to prevent condensation without compromising sealing
- Die-cast aluminium body with UV-resistant imported polycarbonate lens for long-term durability
- Aluminum sliding bottom brackets allow adjustable mounting on uneven surfaces
- 10-30V DC input range supports both 12V and 24V vehicle electrical systems
- Operating temperature range of -40 to +50 degrees Celsius for use in arctic and desert environments
- 50,000+ hour lifespan under continuous operation reduces replacement frequency
- Deutsch connector available as an option for secure, vibration-resistant wiring
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-3400 Series |
|---|---|
| Power Variants | 18W, 36W, 54W, 72W, 90W, 108W, 126W, 144W, 198W, 234W, 288W |
| LED Brand | USA CREE |
| LED Type | 3W high intensity XBD CREE |
| Brightness | 100LM/W |
| Colour Temperature | 6000K |
| Beam Pattern | Spot / Flood / Combo |
| Anti-Fog Design | Yes, anti-frog design with venting |
| Input Voltage | 10-30V DC |
| Operating Temperature | -40 to +50 degrees Celsius |
| Housing Material | Die-cast aluminium |
| Lens Material | UV-resistant imported PC |
| Bracket Material | Aluminum sliding bottom bracket |
| Connector Type | Standard bare wire, Deutsch connector available |
| Lifespan | 50,000+ hours |
| Size | 6.5 inch + more |
| Certification | CE, RoHS |
Materials Used
- Die-cast aluminium housing for heat dissipation and structural strength
- UV-resistant imported polycarbonate lens to resist yellowing and cracking
- Aluminum sliding bottom brackets for adjustable mounting on uneven surfaces
- Silicone gasket and sealed cable entry for water and dust resistance
- Deutsch connector (optional) for secure electrical connection in high-vibration environments
How This Lamp Is Built
Die casting of the aluminium housing and heat sink
UV-resistant polycarbonate lens bonding with sealed gasket
LED board assembly with USA XBD CREE emitters
Anti-frog venting channel integration during housing moulding
Quality Control on This Model
- Photometric output verified in an integrating sphere for lumen accuracy
- Sealing verified against IP68 rating before shipment
- Vibration testing on a vibration test machine to simulate machine-mounted service
- Salt spray corrosion testing on housing coating and brackets
- High and low temperature alternating humidity testing across the -40 to +50 degrees Celsius range
Customisation Options
- Deutsch connector instead of standard bare wire
- Spot, Flood, or Combo beam pattern selected per order
- Private label logo on the housing and printed carton
- Alternative cable length to match a specific vehicle harness
- Mixed cartons combining different wattage models for trial orders
How It Compares With the Alternatives
| Single-row LED light bar | Double-row design increases light output per unit length without increasing width |
|---|---|
| Plastic-bodied light bar | Die-cast aluminium body handles higher heat and resists impact better |
| Standard sealed light bar | Anti-frog design prevents internal fogging during temperature shifts |
| Generic LED light bar | Uses USA XBD CREE LEDs for higher lumen output and longer lifespan |
| Single wattage model | 11 power variants in one series reduce SKU count and simplify inventory |
How to Fit and Use It
- Mount the light bar using the sliding bottom brackets on a flat or slightly curved surface
- Ensure the cable entry point is oriented downward to prevent water ingress
- Use a Deutsch connector if mounting on a vehicle with high vibration or frequent off-road use
- Select the beam pattern (Spot, Flood, Combo) based on the primary lighting need of the vehicle
- Do not use solvents on the PC lens; clean with water and a soft cloth only to preserve UV resistance
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.
Will this light bar work on both 12V and 24V machines
Yes. The operating range is 10 to 30V DC, so the same part number can be fitted to 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, which supports road use in many regions, but specific road approval depends on local regulations.
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