1. Introduction
This manual provides detailed instructions for the safe installation, operation, and maintenance of your DAKASON 4FT LED Vapor Tight Light. Please read this manual thoroughly before installation and retain it for future reference.
The DAKASON 4FT LED Vapor Tight Light is a high-efficiency lighting fixture designed for demanding environments. It features adjustable wattage (40W/50W/60W), 0-10V dimming capability (dimmer not included), and an IP65 rating for resistance against water, dust, and harsh conditions.
2. Safety Information
WARNING: Risk of electric shock. Installation must be performed by a qualified electrician in accordance with all national and local electrical codes.
- Disconnect power at the fuse or circuit breaker before installation or servicing.
- Ensure the supply voltage is compatible with the fixture (100-277V).
- Do not handle live wires.
- Ensure all connections are secure and properly insulated.
- Do not modify the fixture.
- Wear appropriate personal protective equipment (PPE) during installation.
- This fixture is designed for indoor/outdoor use in wet, damp, and dusty areas.
3. Package Contents
Verify that all components are present before beginning installation:
- 1 x 4FT LED Vapor Tight Lighting Fixture
- 10 x Stainless Steel Clips
- 2 x Mounting Brackets
- 4 x Plastic Wall Plugs
- 4 x Screws
- 1 x Waterproof Cable Gland

Figure 3.1: Included mounting kit and components.
4. Specifications
| Feature | Specification |
|---|---|
| Model Number | VPD-4A-50KFD |
| Wattage | 60W (Adjustable to 50W/40W) |
| Lumen Output | 6600lm (at 60W) |
| Color Temperature | 5000K (Day White) |
| Input Voltage | 100-277V AC |
| IP Rating | IP65 (Waterproof, Dustproof) |
| Dimming | 0-10V Dimmable (Dimmer not included) |
| Material | Polycarbonate, Stainless Steel |
| Dimensions | 47.2"L x 3.74"W x 3.38"H |
| Weight | 4.91 pounds (2.23 kg) |
| Certifications | UL Listed |
| Lifespan | 50,000 hours |

Figure 4.1: IP65 rating details for the vapor tight light.
5. Installation Instructions
This fixture supports surface/wall mount and suspension mount (additional accessories required for suspension). The following steps detail surface/wall mounting.
- Turn off power: Before starting, ensure electrical power is turned off at the fuse or circuit breaker box to prevent electric shock.
- Mark mounting locations: Use the mounting brackets to mark the desired locations for drilling holes on the mounting surface.
- Install mounting brackets: Drill holes and secure the mounting brackets to the surface using the provided screws and wall plugs.
- Prepare wiring: Open the fixture housing. Feed the supply wire (not included) through the waterproof cable gland. Select the desired wattage (40W/50W/60W) using the internal switch.
- Wire connections: Connect the supply wires to the LED driver according to the wiring diagram.
- Black (Line) to L
- White (Neutral) to N
- Green (Ground) to Gnd
- Purple (Dim+) and Gray (Dim-) for 0-10V dimming control (if applicable).
- Mount fixture: Lift the fixture housing and snap it into place on the installed mounting brackets.
- Secure lens: Position the lens onto the fixture housing and secure it with the stainless steel latches/clips. Ensure the lens is tightly sealed with the housing to maintain the vapor-tight integrity.

Figure 5.1: Hard-wired installation steps and wiring diagram.
Video 5.1: Demonstration of mounting bracket installation for the vapor tight light.
6. Operating Instructions
Once installed and wired correctly, the DAKASON LED Vapor Tight Light is ready for operation.
- Power On: Restore power at the circuit breaker. The light will illuminate.
- Wattage Selection: The fixture has a selectable wattage switch (40W/50W/60W) located inside the housing. Adjust this switch before sealing the fixture and restoring power to set the desired light output.

Figure 6.1: Internal wattage selection switch.
- Dimming Function: If connected to a compatible 0-10V dimmer switch (not included), the light output can be adjusted from 0% to 100%.
Video 6.1: Demonstration of 0-10V dimming capability in a warehouse setting.
7. Maintenance
The DAKASON LED Vapor Tight Light is designed for minimal maintenance. Follow these guidelines to ensure optimal performance and longevity:
- Cleaning: Periodically clean the exterior of the fixture with a soft, damp cloth. Do not use abrasive cleaners or solvents, as these can damage the polycarbonate housing and lens. Ensure power is off before cleaning.
- Inspection: Regularly inspect the fixture for any signs of damage, loose connections, or wear. Pay attention to the waterproof cable gland and stainless steel clips to ensure the seal remains intact.
- No User-Serviceable Parts: There are no user-serviceable parts inside the fixture. Do not attempt to open or repair the LED driver or LED chips. Contact qualified personnel for any repairs.
8. Troubleshooting
If you experience issues with your DAKASON LED Vapor Tight Light, refer to the following troubleshooting guide:
| Problem | Possible Cause | Solution |
|---|---|---|
| Light does not turn on |
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| Light flickers or dims unexpectedly |
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| Reduced light output |
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If the problem persists after attempting these solutions, please contact DAKASON customer support.
9. Warranty and Support
DAKASON provides a 5-year warranty for this LED Vapor Tight Light, covering defects in materials and workmanship under normal use.
For warranty claims, technical support, or any questions regarding your product, please contact DAKASON customer service through the retailer where the product was purchased or visit the official DAKASON website for contact information.
Please have your model number (VPD-4A-50KFD) and purchase date available when contacting support.





