CPX LED Flat Panel | Lithonia Lighting
Our CPX LED flat panel brings consistent, glare-free illumination to offices, healthcare facilities, and retail environments. The edge-lit design delivers uniform light distribution across the entire surface, eliminating hot spots and shadows common in older troffer fixtures.
The Lithonia Lighting CPX uses edge-mounted LED arrays that inject light into a precision acrylic light guide. This optical system distributes photons evenly across the panel surface, creating a luminous ceiling element rather than a directional beam.
Dimming performance and controls integration
The CPX ships standard with 0-10V analog dimming that interfaces with most commercial lighting control systems. The driver maintains stable color temperature across the full dimming range, preventing the warm shift that occurs in some competing panels at low output levels.
Dimming curve characteristics
We programmed the CPX driver with a logarithmic dimming curve that matches human perception of light level changes. At 50% electrical input, the panel delivers approximately 60% perceived brightness—this alignment makes manual dimming adjustments feel intuitive rather than abrupt.
Installation methods and ceiling compatibility
The CPX installs into standard 15/16-inch exposed tee grid systems without modification. Four spring-loaded mounting clips on the frame perimeter engage the grid rails—the panel simply drops into the opening and the clips automatically secure it.
Retrofit scenarios
When replacing existing fluorescent troffers, the CPX occupies the same ceiling opening with no drywall patching required. The electrical whip extends 48 inches from the driver compartment, reaching junction boxes positioned at typical troffer locations. Many contractors complete installations using the same circuit branch wiring that fed the old fixtures, though we recommend verifying that existing wire gauge supports the new load calculations.
CPX specifications at a glance
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Common questions about the CPX LED flat panel
The CPX installs into standard 15/16-inch exposed tee grid systems commonly found in commercial construction. The panel dimensions match industry-standard 2×2 or 2×4 ceiling tile openings.
For 9/16-inch narrow tee grid or concealed spline systems, we offer adapter hardware kits that allow the CPX to mount securely. The adapter kit includes four corner brackets that bridge the gap between the panel frame and the narrower grid profile.
The standard CPX driver includes a configurable low-end trim that allows you to set the minimum output between 1% and 20%. To adjust this setting, remove the driver cover and locate the small potentiometer labeled ‘MIN’.
Turning the potentiometer clockwise raises the minimum output level, while counterclockwise rotation lowers it. Most applications work well with the factory default of 10%, but spaces requiring deeper dimming for cleaning or security modes can be adjusted lower.
The Lithonia Lighting CPX delivers more uniform light distribution than traditional troffers because the edge-lit design eliminates the lamp-and-reflector geometry that creates striped patterns. The slim profile also provides a more contemporary aesthetic in modern office environments.
Energy consumption drops significantly—a CPX 2×4 panel uses approximately 32 watts compared to 84 watts for a comparable three-lamp T8 troffer. The 50,000-hour LED life span reduces maintenance labor since you’re not replacing lamps every 15,000 hours like fluorescent systems require.
Most commercial office installations use 4000K, which provides neutral white light that doesn’t lean warm or cool. This temperature supports visual tasks without causing eye strain during extended work periods.
Open offices with collaborative workspaces sometimes specify 3500K for a slightly warmer tone that feels less institutional. Facilities focused on alertness and productivity—like call centers or trading floors—often choose 5000K for its blue-enriched daylight appearance.
Yes, the CPX holds DLC Premium certification, which qualifies it for enhanced rebate tiers in most North American utility programs. Rebate amounts vary by territory but typically range from $15 to $45 per fixture.
We provide a complete documentation package including DLC qualification numbers, photometric reports, and specification sheets. Your electrical contractor or energy consultant submits these documents to your local utility along with proof of installation and project invoices.
The CPX works in surface mount configurations using our optional trim kit, which includes a finished frame that conceals the ceiling cut edge. The same LED module and driver are used—only the mounting hardware changes between recessed and surface installations.
Surface mount installations add approximately 1.5 inches to the overall fixture depth compared to recessed mounting. This configuration is common in spaces with hard-lid ceilings, concrete decks, or areas where plenum access is restricted.
We back the CPX with a five-year limited warranty covering defects in materials and workmanship. This warranty includes the LED arrays, driver, housing, and optical components.
If a covered failure occurs during the warranty period, we replace the defective component or fixture at no charge. Labor costs for accessing and replacing the fixture are not covered, so we recommend keeping a small inventory of spare drivers on site for large installations.