Lithonia CPX 2×4 LED Flat Panel
Our CPX 2×4 LED flat panel brings commercial-grade illumination to offices, classrooms, and retail spaces. Engineered with edge-lit LED technology and a white acrylic lens, this fixture delivers uniform, glare-free light across a full 2-foot by 4-foot surface.
We designed the Lithonia lighting CPX for fast installation and long service life. The slim 3.5-inch profile fits standard T-bar ceiling grids, and 0-10V dimming compatibility gives facility managers precise control over energy usage and ambiance. With a 50,000-hour rated life and ENERGY STAR® certification, this panel reduces maintenance frequency and operating costs in any commercial setting.
- 2×4 foot form factor fits standard commercial ceiling grids
- Edge-lit LED technology with white acrylic lens for uniform light distribution
- 3.5-inch slim profile for low-clearance plenum spaces
- 0-10V dimming compatible for flexible light level control
- 50,000-hour rated life (L70) minimizes replacement frequency
Installation & Ceiling Compatibility
The Lithonia CPX 2×4 LED flat panel installs directly into standard 15/16-inch T-bar ceiling grids found in most commercial buildings. Four integrated support clips hold the fixture securely in place without tools or additional hardware.
The panel’s 3.5-inch depth accommodates tight plenum spaces while still providing clearance for junction boxes and wiring. Our quick-connect driver compartment simplifies electrical hookup—installers access all wiring through a hinged door on the fixture side, eliminating the need to remove the entire panel during service calls.
Light Output & Color Temperature Options
Each CPX panel delivers between 3500 and 4000 lumens depending on wattage configuration, providing ample illumination for task-oriented work environments. The edge-lit LED array distributes light evenly across the white acrylic lens, eliminating hot spots and dark corners common with older fluorescent troffers.
We offer three color temperature selections: 3500K produces a warm neutral white ideal for hospitality and retail; 4000K delivers a clean, professional white suited to offices and medical facilities; 5000K provides crisp daylight-equivalent light for industrial and educational spaces. All color temperatures maintain a minimum 80 CRI (Color Rendering Index) for accurate color perception.
Energy Performance & Operating Cost
Our Lithonia lighting CPX panel consumes between 28 and 40 watts depending on lumen output, replacing 2-lamp or 3-lamp fluorescent troffers that typically draw 60-90 watts. Over a 50,000-hour rated life, this efficiency translates to substantial energy savings—a single panel can reduce electricity costs by $150 to $300 compared to legacy fixtures.
The ENERGY STAR certification ensures the CPX meets strict efficacy requirements of 100+ lumens per watt. Facilities pursuing LEED certification or utility rebate programs will find the panel eligible for incentive funding in most jurisdictions.
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CPX 2×4 LED Panel Questions
The Lithonia CPX 2×4 LED flat panel is available in 28W, 32W, 36W, and 40W configurations. Higher wattages produce greater lumen output—ranging from approximately 3500 lumens at 28W to 4000 lumens at 40W.
Your choice depends on ceiling height, desired light levels, and energy budget. For standard 9-foot office ceilings, the 32W or 36W models typically provide optimal illumination for task-oriented work.
Yes, the CPX 2×4 panel can mount to hard ceilings using our optional surface mount kit (sold separately). The kit includes a white steel frame that attaches directly to drywall or plaster ceilings, converting the recessed fixture into a surface-mounted luminaire.
Surface mounting adds approximately 1 inch to the overall fixture depth. This installation method is popular for open-ceiling commercial spaces, residential applications, and retrofit projects where installing a T-bar grid isn’t practical.
The Lithonia lighting CPX delivers superior light quality compared to fluorescent troffers in several ways. The edge-lit LED technology eliminates the visible tube pattern and dark zones common with T8 fixtures, producing uniform illumination across the entire lens surface.
The panel operates completely flicker-free at all brightness levels, reducing eye strain and headaches associated with magnetic fluorescent ballasts. With an 80+ CRI, colors appear more accurate and natural compared to the 75-78 CRI typical of standard fluorescent lamps.
Yes, all CPX panels include a built-in 0-10V dimming driver compatible with standard commercial dimmers, wall controls, and building automation systems. The panel dims smoothly from 100% down to approximately 10% of full output without flickering or color shift.
For installation, connect the purple and gray 0-10V control wires from your dimmer to the corresponding leads in the fixture’s driver compartment. No additional dimming modules or adapters are required.
The CPX panel carries an L70 rating of 50,000 hours, meaning the LEDs will maintain at least 70% of their initial brightness for 50,000 operating hours under normal conditions. At 12 hours per day of operation, this translates to approximately 11 years of service life.
After 50,000 hours, the panel continues to function but light output gradually decreases. Most commercial facilities replace panels when output drops below 70% to maintain consistent illumination across large spaces.
The standard CPX 2×4 panel carries a UL wet location rating when installed in ceiling grids, making it suitable for interior spaces with occasional moisture exposure such as covered walkways, climate-controlled warehouses, and corridors near restrooms.
The fixture is not rated for direct outdoor exposure to rain, snow, or extreme temperatures. For fully outdoor or harsh environment applications, we recommend our contractor-grade wet location fixtures specifically engineered for those conditions.
Yes, the ENERGY STAR certified CPX panel qualifies for utility rebates in most jurisdictions across North America. Rebate amounts vary by location and utility provider but typically range from $15 to $40 per fixture for commercial retrofits.
For LEED certification, the CPX contributes to Energy & Atmosphere credits through its high efficacy (100+ lumens per watt) and low energy consumption. The fixture’s long service life also supports Materials & Resources credits by reducing waste from frequent lamp and ballast replacements.