Lithonia Lighting 4-Ft LED Flush Mount Light Instruction Manual
Model: FMLBML 48IN 40K 80CRI BN
Introduction
This manual provides comprehensive instructions for the safe installation, operation, and maintenance of your Lithonia Lighting 4-foot LED Linear Flush Mount Light. This fixture is designed to provide general illumination with a 4000K cool white light output, suitable for various indoor applications.

Image: The Lithonia Lighting 4-foot LED Flush Mount Light, showcasing its sleek design and brushed nickel accents.
Safety Precautions
Always turn off power at the circuit breaker before beginning installation or performing any maintenance. This fixture is intended for indoor use only and should not be installed in outdoor or wet locations. Consult a qualified electrician if you are unsure about any part of the installation process. Wear appropriate safety gear, including safety glasses, during installation.
Package Contents
Verify that all components are present before beginning installation:
- LED Linear Flush Mount Light Fixture
- Mounting Hardware (screws, anchors)
- Mounting Tape
- Installation Instructions

Image: A diagram illustrating the dimensions of the light fixture, measuring 47.56 inches in length, 8.73 inches in width, and 3.52 inches in height.
Product Specifications
| Brand | Lithonia Lighting |
| Model Name | FMLBML 48IN 40K 80CRI BN |
| Color | Brushed Nickel |
| Style | 4000K | Cool White |
| Power | 36.0W |
| Input Voltage | 120V |
| Luminous Flux | 3,400 Lumens |
| Color Temperature | 4000 Kelvin |
| Dimmable | Yes (with most TRIAC Dimmers) |
| Light Source | LED |
| CRI | 80 |
| Dimensions | 47.56"L x 8.73"W x 3.52"H |
| Average Life | 50,000 hours |
| Certifications | UL Certified (USA & Canada), Energy Star Rated, Damp Listed |

Image: Certifications and features of the light fixture, including UL Listed, Damp Location, Dimmable LED, and Energy Star ratings.

Image: Detailed lighting facts for various models and a list of compatible TRIAC dimmers from manufacturers like Leviton and Lutron.
Installation Instructions
This fixture is designed for flush mounting to a ceiling or wall. Ensure the mounting surface is structurally sound and capable of supporting the fixture's weight. Always refer to the detailed diagrams and instructions provided in the printed manual for precise steps.
- Prepare the Area: Turn off power at the circuit breaker controlling the fixture location. Remove any existing light fixture if applicable.
- Mount the Fixture Base: Secure the fixture base to the ceiling or wall using the provided mounting hardware. Use appropriate anchors for your ceiling type.
- Electrical Connection: Connect the fixture's wires to the building's electrical supply wires (black to black, white to white, ground to ground) according to local electrical codes. Ensure all connections are secure.
- Attach Diffuser and Cover: Carefully attach the acrylic diffuser and any decorative covers to the fixture base.
- Restore Power: Turn power back on at the circuit breaker and test the light fixture.
For detailed diagrams and step-by-step guidance, please refer to the printed instruction manual included with your product.
Operating Your LED Flush Mount Light
This LED fixture provides a 4000K Cool White light, ideal for areas requiring bright, clear illumination.
Dimmability
The fixture is dimmable with most TRIAC dimmers. Ensure your dimmer switch is compatible for optimal performance and to avoid flickering or damage.
Recommended Room Coverage
- 1 unit for rooms measuring less than 7 square feet (with an 8-foot ceiling)
- 2 units for rooms measuring between 8 and 12 square feet (with an 8-foot ceiling)
- 3 units for rooms measuring between 12 and 15 square feet (with an 8-foot ceiling)
Light Color Information
The 4000K Cool White light provides a neutral, bright atmosphere. For comparison with other common color temperatures:
- 3000K (Bright White): Used in family homes, hotels, coffee shops, and other warm environments.
- 4000K (Cool White): Provides a soft white lighting atmosphere, suitable for general home use.

Image: A visual comparison demonstrating the difference in ambiance created by 2700K Warm White, 3500K Bright White, and 4000K Cool White (Daylight) lighting.
Application Areas
This fixture is ideal for new constructions, remodels, or retrofit installations. Suitable for various indoor spaces including closets, attics, hallways, bathrooms, kitchens, basements, foyers, bedrooms, offices, utility work areas, and garages. It is also a perfect lighting solution for multifamily and hospitality locations such as apartments, education dormitories, condos, hotels, and motels.

Image: Multiple Lithonia Lighting LED Flush Mount Lights illuminating a contemporary office space, demonstrating their effectiveness in a professional setting.
Care and Maintenance
The long-life LEDs are designed to last approximately 50,000 hours, or about 23 years when used 6 hours per day. This significantly reduces the need for frequent bulb changes, offering a low-maintenance lighting solution.
To clean the fixture, ensure power is off at the circuit breaker. Use a soft, dry, or slightly damp cloth. Avoid abrasive cleaners, solvents, or harsh chemicals, as these can damage the finish or electrical components.
Troubleshooting
If the light fixture does not operate correctly, consider the following:
- No Light: Check that the power supply is on at the circuit breaker. Ensure all electrical connections are secure.
- Flickering or Dimming Issues: Verify that the dimmer switch (if installed) is compatible with LED fixtures and functioning correctly. Incompatible dimmers can cause performance issues.
- Inconsistent Light Output: Ensure the fixture is properly installed and all components are securely in place.
- Persistent Problems: If issues persist after checking these points, consult a qualified electrician for further assistance.
Warranty and Support
This Lithonia Lighting product comes with a 5-year limited warranty. For warranty claims, technical assistance, or product inquiries, please contact Lithonia Lighting customer support through their official channels.
The fixture meets high industry standards, including UL certification in the USA and Canada, and is Energy Star Rated, ensuring quality and energy efficiency.
Visit the official Lithonia Lighting store for more products and support: Lithonia Lighting Store.





