4 Inch 27W Hot Sale Square LED Work Light
The SLL-4003 is a 4 inch square LED work light designed for machines that operate in harsh environments such as forestry, mining, roadwork and construction. It delivers 2100 effective lumens from nine 3W Bridgelux LEDs, providing consistent illumination across the work zone without hot spots. The die-cast aluminium housing and IP68 sealing ensure durability under vibration, dust and water exposure, while the 9–32V operating range supports both 12V and 24V vehicle systems. Overheat and overvoltage protection prevent electrical failure during unstable power conditions.
- 2100 effective lumens from nine 3W Bridgelux LEDs cover the full work area evenly instead of creating a narrow bright spot
- IP68 sealing and a sealed cable entry gland prevent water ingress during pressure washing or exposure to mud and dust
- 9–32V DC input allows one part number to be used across 12V and 24V fleets, reducing inventory complexity
- Overheat and overvoltage protection prevent damage during power surges or prolonged operation in high ambient temperatures
- 50,000 hour lifespan means replacement is measured in years rather than months, reducing maintenance downtime
Where This Lamp Is Used
- Front and side work lighting on excavators and loaders operating in wet or dusty conditions
- Auxiliary lighting on forestry machines where vibration and exposure to rain degrade standard lamps
- Roadwork vehicle lighting in remote areas where power stability is poor and voltage fluctuates
- Mining support vehicle lighting where dust and moisture are constant threats to electrical components
- Construction site lighting on cranes and engineering vehicles that require reliable illumination after dark
Who It Is For
- Distributors of vehicle lighting needing one SKU to serve both 12V and 24V markets
- Machinery OEMs fitting work lights on production lines and requiring consistent mounting patterns
- Fleet operators replacing halogen lamps that fail under vibration or during frequent wash cycles
- 4x4 and industrial accessory brands building a private label work lamp range with proven durability
Problems It Solves
- Halogen work lamps burn out quickly under vibration and draw significantly more current than LED alternatives
- Cheap sealed lamps allow water to enter through the cable entry and fog up after a few wash cycles
- Narrow beam lamps light only a small area and leave the edges of the machine in shadow
- Lamps with no overvoltage protection fail during power surges common in older vehicle electrical systems
- Painted mild steel brackets rust within weeks on machines exposed to daily washing with water or salt
Technical Features
- Nine 3W Bridgelux LEDs with a total real power draw of 27W and a maximum rating of 30W
- Flood or spot beam pattern available depending on the lens option selected
- Semi-gloss black UV-resistant polyester powder coating over the full housing and bracket
- Bare wire lead of 40cm as standard with Deutsch connector available on request
- Overheat and overvoltage protection built into the driver circuit
- Operating window of -40 to +60 degrees Celsius, suitable for extreme cold and hot climates
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-4003 |
|---|---|
| Real Power | 27W |
| LED | 9 pcs x 3W Bridgelux |
| Beam Pattern | Flood or Spot (optional) |
| Colour Temperature | 6000K |
| Operating Voltage | 9–32V DC |
| Lens Material | Anti-scratch UV-resistant polycarbonate |
| 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 gland
- UV-resistant 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 Bridgelux 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 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 +60 degrees Celsius range
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 a specific machine harness
- Mixed cartons combining this lamp with other SUNLITEC models for trial orders
How It Compares With the Alternatives
| Round 4 inch work lamp | The square body puts more LED area behind the same mounting footprint but needs a flat surface for the bottom bracket |
|---|---|
| Spot beam version of the same lamp | Flood covers the near working area evenly while spot reaches further ahead but leaves the machine edges dark |
| Larger 6 inch work lamp | Lower output but fits guard rails and cab pillars where a 6 inch body will not clear |
How to Fit and Use It
- 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 working area close to the machine 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, which meets basic electrical safety and environmental standards for road use.
Get a Price on 4 Inch 27W Hot Sale Square LED Work Light
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