1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Lithonia Lighting FML4W 4-Foot LED Wraparound Ceiling Light. This low-profile fixture is designed for versatility and durability, offering adjustable brightness and a wide housing to cover existing blemishes from older fixtures, making it ideal for both renovation and new construction projects.

Figure 1: Lithonia Lighting FML4W LED Wraparound Ceiling Light
2. Safety Information
Please read and understand all instructions before beginning installation. Failure to do so may result in electric shock, fire, or other hazards that could cause personal injury or property damage.
- WARNING: Risk of electric shock. Disconnect power at the fuse or circuit breaker before installing or servicing.
- WARNING: Risk of fire. Use only with specified voltage and wattage.
- All wiring connections must be in accordance with local and National Electrical Code (NEC) standards. If you are unfamiliar with proper electrical wiring connections, consult a qualified electrician.
- This fixture is rated for damp locations.
- Wear safety glasses and gloves during installation.
3. Package Contents
- 1 x FML4W LED Wraparound Ceiling Light Fixture
- Mounting Hardware
- Instruction Manual
4. Specifications
| Feature | Specification |
|---|---|
| Model Number | FML4W 48 ALO6 SEF 840 MVOLT |
| Dimensions (L x W x H) | 48.5" x 11.5" x 3.5" |
| Voltage | MVOLT 120-277V |
| Wattage | 49 watts |
| Adjustable Lumens | 4000, 5000, or 6000 Lumens |
| Color Temperature | 4000K Cool White |
| Dimming | 0-10V Dimming |
| Material | Alloy Steel, Aluminum |
| Mounting Type | Ceiling Mount (Flush Mount) |
| Certifications | CSA Certified |
| LED Lifespan | Up to 60,000 hours (L85 rating) |

Figure 2: Product Dimensions
5. Installation
The FML4W fixture is designed for easy flush mounting directly to recessed junction boxes. Its wide housing helps cover existing ceiling blemishes from previous fixtures.
5.1 Wiring
- Ensure power is disconnected at the circuit breaker before starting.
- Connect the fixture's line-voltage wires to the corresponding wires in the junction box (Black to Black, White to White, Green/Bare Copper to Ground).
- For 0-10V dimming, connect the purple and gray dimming wires to the appropriate dimmer control wires.
- Note: Some installations may require bringing wires into the fixture. Always ensure connections comply with local electrical codes. If unsure, consult a qualified electrician.
5.2 Mounting the Fixture
- Secure the fixture to the junction box using the provided mounting hardware.
- Ensure the fixture is flush against the ceiling and securely fastened.
5.3 Lens Installation and Removal
For detailed visual instructions on installing and removing the lens, please refer to the official video below.
Video 1: FML4W Lens Installation Guide. This video demonstrates the correct procedure for attaching and detaching the diffuser lens from the FML4W fixture.
- To Install: Start with one edge of the lens, align it with the flange, then bring the other corner down underneath the housing. Pop the lens back up to engage. Slide the lens along the edge until it is fully seated, then center it.
- To Remove: Push down on the center of one end of the lens and slide it down to reveal a gap. Then, pull it out at the gap.
6. Operating Instructions
Your FML4W LED Wraparound Ceiling Light features adjustable lumen output to suit various lighting needs.
6.1 Adjusting Lumen Output
The fixture allows you to select between 4000, 5000, or 6000 lumens. This adjustment is typically made via a dial located inside the fixture, accessible by removing the lens. Use a flathead screwdriver to set the desired output:
- MIN (#3) = ~4000LM
- MID (#5) = ~5000LM
- MAX (#8) = ~6000LM
For a visual demonstration of the product's features, including lumen adjustment, please watch the overview video:
Video 2: FML4W Wraparound Product Overview. This video highlights the key features and benefits of the FML4W LED Wraparound Ceiling Light.
6.2 Dimming
This model supports 0-10V dimming. Ensure you have a compatible 0-10V dimmer switch installed for dimming functionality.
7. Maintenance
The FML4W LED fixture requires minimal maintenance.
- Cleaning: Disconnect power before cleaning. Wipe the fixture and lens with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- LEDs: The integrated LEDs are designed for long life (up to 60,000 hours) and do not require replacement.
8. Troubleshooting
If your fixture is not operating correctly, perform the following basic checks:
- No Light:
- Ensure power is supplied to the fixture at the circuit breaker.
- Check all wiring connections for proper contact.
- Dimming Issues:
- Verify that the dimmer switch is compatible with 0-10V LED fixtures.
- Check the dimming wire connections (purple and gray).
- If problems persist after performing these checks, consult a qualified electrician or contact Lithonia Lighting customer support.
9. Warranty and Support
This Lithonia Lighting FML4W LED Wraparound Ceiling Light is backed by a 5-year limited warranty. This warranty covers defects in materials and workmanship under normal use.
For warranty claims, technical support, or further assistance, please contact Lithonia Lighting customer service. Refer to the product packaging or the Lithonia Lighting website for current contact information.







