4 Inch 48W Utility High Intensity LED Work Light E-Mark Approved
The SLL-4028-48 is a 4 inch high intensity LED work light designed for utility machines operating in extreme conditions across agriculture, forestry, mining, roadwork and construction. It delivers 2200 effective lumens from 16 x 3W CREE LEDs and is E-Mark approved, which allows it to be used on vehicles that operate on public roads. The die-cast aluminium housing with UV resistant powder coating and IP68 sealing ensures long-term performance in dust, rain and vibration. The wide 9–32V DC operating range supports both 12V and 24V systems, reducing SKU complexity for fleet operators and OEMs.
- E-Mark approval enables use on public road vehicles without electrical interference issues
- 2200 effective lumens from 16 x 3W CREE LEDs provide bright, even illumination for utility work areas
- IP68 sealing and a durable polycarbonate lens resist water, dust and impact in harsh environments
- 9–32V DC input works on both 12V and 24V systems, simplifying inventory and wiring
- Overvoltage and overheat protection prevent damage from electrical surges or blocked airflow
Where This Lamp Is Used
- Front and side lighting on agricultural tractors and harvesters during early morning or late evening field work
- Cab and boom lighting on excavators and loaders in mining and road construction zones
- Auxiliary lighting on forestry skidders and forwarders operating in remote, dusty terrain
- Work area illumination on utility trucks and service vehicles used in roadside maintenance
- Lighting on mobile machinery in cold climates where standard lamps fail below -20 degrees Celsius
Who It Is For
- Fleet operators managing 12V and 24V vehicle fleets who need one part number for mixed systems
- Machinery OEMs fitting work lights on production lines and requiring E-Mark compliance for road use
- Distributors selling lighting for off-road and utility vehicles needing a durable, long-life option
- 4x4 and equipment accessory brands building a private label utility light range with E-Mark certification
- Construction and mining contractors replacing halogen lights that fail under vibration and heat
Problems It Solves
- Halogen work lights burn out quickly under vibration and draw excessive current from vehicle electrical systems
- Non-certified auxiliary lights may fail road inspection due to electromagnetic interference on public roads
- Cheap plastic lenses degrade under UV exposure and become brittle or foggy after months of outdoor use
- Narrow beam lights leave the near working area dark while over-lighting distant objects
- Standard brackets corrode or break when exposed to salt, mud or frequent washdowns
Technical Features
- 16 x 3W CREE LEDs with a real power draw of 48W and a maximum rating of 48W
- Flood or spot beam options available to match task-specific lighting needs
- Semi-gloss black UV resistant polyester powder coating on the full housing
- Bare wire lead of 40cm as standard with Deutsch connector available on request
- Overvoltage and overheat protection built into the driver circuit
- Operating temperature range of -40 to +85 degrees Celsius for extreme climate use
- IP68 sealing with a sealed cable entry gland to prevent water and dust ingress
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-4028-48 |
|---|---|
| Max Power | 48W |
| Real Power | 48W |
| LED | 16 pcs x 3W CREE |
| Beam Pattern | Flood or Spot (optional) |
| Colour Temperature | 6000K |
| Operating Voltage | 9–32V DC |
| Lens Material | Anti-UV polycarbonate |
| Waterproof Rating | IP68 |
| Operating Temperature | -40 to +85 degrees Celsius |
| Electrical Connection | Bare wire 40cm, Deutsch connector available |
| Certification | E-Mark, CE, RoHS |
Materials Used
- Anti-UV, durable 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 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 stainless bracket
- High and low temperature alternating humidity testing across the -40 to +85 degrees Celsius window
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
| Halogen work lamp of similar output | Draws 4A at 12V against roughly triple that for halogen and survives vibration that kills a filament |
|---|---|
| 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
- Wire through a fused feed sized for 4A at 12V or 2A at 24V and keep the cable entry pointing downward
- 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
Yes. The lamp is E-Mark approved, CE and RoHS compliant, and carries IP68 sealing for reliable performance.
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