4 Inch 30W Flush Mount LED Fog Light
The SLL-4033 is a 4 inch flush mount LED fog light designed to replace original equipment headlights on off-road vehicles, trucks, and heavy machinery that operate in wet, dusty, or vibration-heavy conditions. Three 10W CREE LEDs deliver 2100 effective lumens in a low beam pattern, providing clear visibility during night operations or low-visibility weather without the glare of a high beam. The die-cast aluminium housing and durable polycarbonate lens are rated IP68, ensuring long-term performance in harsh environments. The 9–32V operating range supports both 12V and 24V systems, reducing the number of SKUs needed for fleet or OEM use.
- Flush mount design replaces original headlights without requiring body modifications
- 2100 effective lumens in low beam pattern provide clear, wide visibility without glare
- IP68 sealing prevents water and dust ingress during pressure washing or off-road use
- 9–32V operating range supports both 12V and 24V vehicle electrical systems
- Overvoltage and overheat protection prevent damage from electrical surges or prolonged use
Where This Lamp Is Used
- Replacing original fog lights on off-road vehicles used in mining or forestry operations
- Fitting as a low beam auxiliary light on full size SUVs and trucks operating in rain or fog
- Mounting on cranes and engineering vehicles where vibration and dust degrade standard lights
- Integrating into fleet vehicles that require consistent lighting across 12V and 24V systems
- Using as a permanent fog light on utility vehicles that operate in coastal or salt-heavy environments
Who It Is For
- Machinery OEMs fitting fog lights during production for vehicles that operate in extreme conditions
- Fleet operators replacing halogen fog lights that fail under vibration or moisture
- Distributors selling replacement fog lights for 4x4 and truck accessories with a universal voltage range
- Equipment dealers offering a direct OEM replacement for factory-installed fog lights
- 4x4 accessory brands building a private label fog light range with flush mount compatibility
Problems It Solves
- Original fog lights fail early due to moisture ingress and poor sealing in dusty or wet environments
- Halogen fog lights draw more current and burn out within months under continuous vibration
- Non-IP68 sealed lights fog up or short circuit after repeated wash cycles or exposure to salt
- Narrow beam or high beam lights create glare for oncoming traffic or blind spots in low visibility
- Voltage mismatch between 12V and 24V systems forces distributors to stock multiple SKUs
Technical Features
- Three 10W CREE LEDs with a real power draw of 30W and 30W maximum rating
- Low beam pattern with 2100 effective lumens and a 1 lux reading at 50 meters
- Semi-gloss black powder coating over the full housing and flush mount surface
- Flush mount design with a 4 inch diameter mounting face and 10mm depth
- Bare wire lead of 40cm as standard with Deutsch connector available on request
- Overvoltage and overheat protection built into the internal circuitry
- Operating window of -40 to +60 degrees Celsius for use in extreme climates
- IP68 sealing with a gasketed cable entry and sealed housing joints
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-4033 |
|---|---|
| Max Power | 30W |
| Real Power | 30W |
| LED | 3 pcs x 10W CREE |
| Beam Pattern | Low Beam |
| 1 Lux Reading | Low Beam 50 meters |
| Colour Temperature | 6000K |
| Operating Voltage | 9–32V DC |
| Lens Material | Anti-scratch PC |
| Mounting | Flush mount, 4 inch diameter, 10mm depth |
| Waterproof Rating | IP68 |
| Operating Temperature | -40 to +60 degrees Celsius |
| Electrical Connection | Bare wire 40cm, Deutsch connector available |
| Certification | CE, RoHS |
Materials Used
- Anti-scratch UV resistant polycarbonate lens
- Silicone rubber gasket and sealed cable entry
- Semi-gloss black powder coating on housing and mounting surface
- Internal circuit board with overvoltage and overheat protection components
How This Lamp Is Built
Die casting of the aluminium housing and heat sink
Powder coating in semi-gloss black
LED board assembly with CREE emitters
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 reproduce machine mounted service
- Salt spray corrosion testing on housing coating and internal components
- High and low temperature alternating humidity testing across the -40 to +60 degrees Celsius window
Customisation Options
- Deutsch DT connector instead of the standard 40cm bare wire lead
- Alternative cable length for a specific machine harness
- Private label logo on the housing and printed carton
- Mixed cartons combining this fog light with other SUNLITEC models for trial orders
- Low beam optics in place of other beam patterns (if available)
How It Compares With the Alternatives
| Round 4 inch fog light | The flush mount design fits flush with the vehicle body, reducing aerodynamic drag and improving fit on OEM mounting points |
|---|---|
| Spot beam version of the same lamp | Low beam spreads light across the near road surface while spot reaches further ahead but leaves the immediate area dark |
| Larger 5 inch fog light | Smaller footprint fits in tighter spaces like front grilles or narrow fenders where a 5 inch body will not clear |
How to Fit and Use It
- Mount flush with the vehicle body using the 4 inch diameter mounting face and check depth clearance before drilling
- Leave a drip loop in the 40cm lead so water runs away from the gland rather than into it
- Aim the low beam at the road surface close to the vehicle and use a spot lamp separately for distance
- Clean the PC lens with water and a soft cloth only, since solvents will haze 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 road going machines
The lamp is CE and RoHS compliant and carries IP68 sealing, which is required for use on vehicles operating on public roads.
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Guides and Machine Briefs
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