Installation and Technical Overview of Lithonia Lighting FML4W LED Wraparound Fixtures

The Lithonia Lighting FML4W series of LED wraparound fixtures is designed for both residential and commercial applications, offering energy efficiency, adjustable lighting output, and compatibility with standard electrical systems. As a retrofit solution for T8 or T12 fluorescent fixtures, the FML4W provides long-lasting illumination with minimal maintenance. This article provides a detailed technical overview of the FML4W 48" model, focusing on its installation requirements, key features, and specifications based on manufacturer-provided data.

Overview of the FML4W 48" LED Wraparound Fixture

The FML4W 48" LED wraparound fixture is part of a family of lighting solutions designed for surface mounting in ceiling applications. It is engineered to replace traditional T8 or T12 fluorescent fixtures in both new construction and renovation projects. The fixture is available in multiple dimming options, including 0–10V and Triac dimming, with some models offering switchable lumen output.

The wide housing design is a key feature of the FML4W, allowing it to cover imperfections left by older fixtures during a retrofit. The fixture is also suitable for use in damp locations, such as laundry rooms, utility rooms, and kitchens, where exposure to moisture is a concern.

Key Specifications and Features

The FML4W 48" LED wraparound fixture offers a combination of performance, efficiency, and flexibility, making it a popular choice for a variety of applications. The following are the key specifications and features provided in the source material:

Wattage: 53.4 watts (source 2, 3)
Lumen Output: 5,000 lumens (source 3, 5); some models are switchable between 4,000, 5,000, and 6,000 lumens (source 5)
Color Temperature: 4000K (cool white)
Color Rendering Index (CRI): 80 or 85 (source 4)
Dimming Options: 0–10V, Triac (source 3, 5)
Voltage Compatibility: 120–277 volts (MVOLT) (source 1, 2)
Mounting Type: Surface mount to a recessed junction box
Lifespan: 60,000 hours at 85% lumen maintenance
Certifications: CSA Certified, DLC Listed, Damp Location Listed (source 1, 3)
Dimensions: 47-7/8" in length, 3" in height, and 10" in depth (source 2)
Material: Steel housing with a white polycarbonate diffuser (source 2)
Warranty: 5-year limited manufacturer warranty (source 2, 3)

The fixture is manufactured in Mexico and is suitable for both residential and commercial environments, including kitchens, basements, hallways, offices, and utility rooms.

Installation Requirements and Mounting

The FML4W 48" LED wraparound fixture is designed for surface mounting in ceiling applications. It is intended to be installed using a recessed junction box, and all electrical connections must be made inside this box. The following are key installation requirements and considerations:

1. Electrical Compatibility

The FML4W is compatible with 120–277 volt systems, making it suitable for both residential and light commercial applications. The fixture uses a standard MVOLT (multi-voltage) driver, which allows for flexibility in voltage input without the need for additional configuration.

For dimmable models, the dimming method must be verified. The 0–10V and Triac dimming options require compatible dimming switches and control systems. The source material does not provide specific instructions for configuring these dimming methods but emphasizes the need to ensure compatibility with existing control infrastructure.

2. Mounting to a Recessed Junction Box

The fixture is designed to be mounted to a recessed junction box. This means that the installation process involves securing the fixture to the box, ensuring that all electrical connections are made within the box, and verifying that the fixture is level and properly aligned with the ceiling.

The wider housing of the FML4W is particularly beneficial in retrofit scenarios, as it can cover up the area where an older fixture was removed. This reduces the need for additional drywall or ceiling repairs, simplifying the installation process.

3. Location Considerations

The FML4W is rated for use in damp locations, such as laundry rooms, utility rooms, and kitchens. This means that it can be installed in environments where moisture is present, but it is not suitable for fully enclosed or outdoor applications.

The fixture should be installed in accordance with local electrical codes and manufacturer recommendations. The source material does not provide detailed installation instructions but emphasizes the importance of proper electrical connections and secure mounting.

Dimming and Lumen Adjustment

Several models of the FML4W series offer dimming and lumen adjustment features, which provide greater control over lighting levels in different environments.

0–10V Dimming

The 0–10V dimming option allows for smooth and precise control of light output using a standard 0–10V dimming control system. This method is commonly used in commercial and residential applications where variable lighting levels are required.

The source material does not specify the exact range of dimming or the minimum light output achievable with this method, but it does confirm that the fixture is compatible with 0–10V dimming systems.

Triac Dimming

Triac dimming, also known as line-voltage dimming, is another available option for the FML4W. This method uses a standard Triac-based dimmer switch, which is commonly found in residential lighting systems.

The Triac dimming model is specified as producing 5,000 lumens at 120V and is dimmable through line voltage. This makes it a suitable option for applications where a conventional dimming system is in place.

ALO6 Lumen Switching

The ALO6 (Adjustable Lumen Output 6000) feature allows the user to switch between 4,000, 5,000, and 6,000 lumens. This is particularly useful in applications where the lighting requirements may change depending on the time of day or the function of the space.

The source material does not provide information on how to switch between lumen levels, but it does confirm that this feature is available on select models.

Performance and Energy Efficiency

The FML4W 48" LED wraparound fixture is designed to provide high-quality illumination with minimal energy consumption. The following are key performance and energy efficiency characteristics:

1. LED Technology

The fixture uses long-life LED technology, which is known for its durability and energy efficiency. LEDs typically have a longer lifespan and consume less energy than traditional fluorescent or incandescent lighting.

The source material confirms that the FML4W maintains 85% of its lumen output at 60,000 hours, which is a standard benchmark for LED longevity.

2. Energy Savings

The FML4W consumes 53.4 watts of power and produces 5,000 lumens of light, which is significantly more efficient than traditional T8 or T12 fluorescent fixtures. The exact energy savings will depend on the specific application and the type of fixture being replaced.

The fixture is also DLC (DesignLights Consortium) listed, which means that it meets energy efficiency standards and is eligible for rebates in certain utility programs.

3. Color Quality

The fixture produces a 4000K cool white color temperature, which is well-suited for task lighting and general illumination. The color rendering index (CRI) is either 80 or 85, depending on the model, which means that it provides good color accuracy for most environments.

Applications and Use Cases

The FML4W 48" LED wraparound fixture is suitable for a wide range of applications, both in residential and commercial settings. The following are some of the key use cases identified in the source material:

Residential: Kitchens, basements, hallways, and laundry rooms
Commercial: Stairwells, warehouse/distribution centers, offices, retail spaces
Damp Locations: Utility rooms, locker rooms, and other areas with high humidity

The fixture’s wide housing and retrofit-friendly design make it particularly useful in renovation projects where existing fixtures are being replaced. It can also be used in new construction as a cost-effective and energy-efficient lighting solution.

Warranty and Compliance

The FML4W 48" LED wraparound fixture is backed by a 5-year limited manufacturer warranty. This warranty covers defects in materials and workmanship under normal use and installation conditions.

The fixture is also compliant with several industry standards and regulations, including:

CSA Certified
DLC Listed
Damp Location Listed
Title 24 Compliant
ADA Compliant
California Compliant
UL Listed

These certifications ensure that the fixture meets safety, performance, and energy efficiency requirements for use in both residential and commercial environments.

Conclusion

The Lithonia Lighting FML4W 48" LED wraparound fixture is a versatile and energy-efficient lighting solution designed for both new construction and renovation projects. It offers adjustable lumen output, dimming capabilities, and compatibility with standard electrical systems, making it suitable for a wide range of applications. The fixture’s wide housing design simplifies retrofit installations, while its use of long-life LED technology ensures extended service life and reduced maintenance costs. With a 5-year limited warranty and compliance with industry standards, the FML4W is a reliable and cost-effective lighting option for both residential and commercial environments.