1. Introduction
Thank you for choosing the Lithonia Lighting CPX 2x4 LED Flat Panel Light. This fixture is designed to provide efficient, high-quality illumination for various indoor applications, including commercial offices, schools, retail spaces, garages, and laundry rooms. Featuring a smooth satin lens, 4000 lumens of 4000K cool white light, and a long-life LED system, this panel ensures consistent, flicker-free lighting. This manual provides essential information for the safe installation, operation, and maintenance of your new LED flat panel light.
Figure 1: Lithonia Lighting CPX 2x4 LED Flat Panel Light
2. Safety Information
Please read and understand all instructions before beginning installation. Failure to follow these instructions may result in electric shock, fire, or other hazards that could cause property damage or personal injury.
- 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.
- Installation must be performed by a qualified electrician in accordance with the National Electrical Code (NEC) and local code requirements.
- Do not install in locations where the operating temperature exceeds the fixture's rated temperature.
- Ensure all electrical connections are secure and properly insulated.
- Wear safety glasses and gloves during installation.
- This fixture is suitable for damp locations. Do not use in direct contact with water.
3. Package Contents
Carefully unpack your fixture and inspect for any damage. If any parts are missing or damaged, contact your retailer or Lithonia Lighting customer service.
- CPX 2x4 LED Flat Panel Light Fixture
- Product Information Guide (this manual)
4. Setup and Installation
The CPX LED Flat Panel Light is designed for flexible installation, compatible with recessed mounting into a T-grid ceiling. Refer to the detailed steps below and the installation video for guidance.
- Turn off Power: Before starting, ensure the power supply to the installation area is turned off at the circuit breaker.
- Prepare Opening: For T-grid ceiling installations, ensure the grid opening is clear and correctly sized for a 2 ft. x 4 ft. fixture.
- Position Fixture: Carefully lift the LED panel into the T-grid opening.
- Secure Fixture: The fixture includes integrated T-grid clips. Bend these clips away from the fixture housing and secure them onto the T-grid railing to prevent accidental dislodging.
- Wiring: Remove the driver box access plate and knockouts. Make all electrical connections (line, neutral, ground, and dimming wires if applicable) according to local NEC code requirements. Ensure proper polarity and secure connections.
- Close Driver Box: Tuck all wires back into the driver box, replace the access plate, and secure it.
- Restore Power: Once installation is complete and all connections are checked, restore power at the circuit breaker.
Figure 2: Installation Steps Overview
Video 1: Flat Panel Installation Guide. This video demonstrates the installation process for Lithonia Lighting flat panel fixtures.
5. Operating Instructions
The Lithonia Lighting CPX 2x4 LED Flat Panel Light operates like a standard lighting fixture once installed and powered. It is compatible with 0-10 volt dimmer switches, allowing for adjustable light output.
- Power On/Off: Control the fixture using a standard wall switch connected to the power supply.
- Dimming: If connected to a compatible 0-10V dimmer switch, adjust the dimmer control to achieve the desired light level. The fixture can dim down to 10% of its full output.
6. Maintenance
The CPX LED Flat Panel Light is designed for long-term, maintenance-free operation. No user-serviceable parts are inside the fixture.
- Cleaning: To clean the fixture, ensure power is off. Use a soft, dry, or slightly damp cloth. Do not use abrasive cleaners or solvents, as they may damage the finish or lens.
- LED Lifespan: The integrated LEDs have a rated lifespan of 50,000 hours at greater than 70% lumen maintenance, meaning they will provide years of reliable illumination without needing replacement.
7. Troubleshooting
If your LED flat panel light is not functioning correctly, refer to the following common issues and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Light does not turn on | No power to the fixture; Loose wiring; Faulty switch | Check circuit breaker; Verify all wire connections are secure; Test the wall switch. |
| Light flickers | Loose wiring; Incompatible dimmer switch; Voltage fluctuations | Check wiring connections; Ensure dimmer is 0-10V compatible; Consult an electrician for voltage issues. |
| Light is too dim or too bright (not dimming properly) | Incorrect dimmer wiring; Incompatible dimmer; Dimmer setting | Verify dimmer wiring (0-10V); Ensure dimmer is compatible; Adjust dimmer control. |
If the problem persists after trying these solutions, contact a qualified electrician or Lithonia Lighting customer support.
8. Specifications
| Feature | Specification |
|---|---|
| Model Number | CPX 2X4 4000LM 40K M4 |
| Dimensions (L x W x H) | 47.8 in. x 23.8 in. x 1.7 in. |
| Light Output | 4000 Lumens |
| Color Temperature | 4000K Cool White |
| Voltage | 120-277 Volts (MVOLT) |
| Wattage | 40 Watts |
| Dimming | 0-10V Dimming (down to 10%) |
| Lifespan | 50,000 hours (L70) |
| Certifications | CSA Certified, IC Rated, DLC Qualified |
| Location Rating | Damp Locations |
| Material | Aluminum |
Figure 3: CPX 2x4 LED Flat Panel Dimensions
9. Warranty and Support
This Lithonia Lighting CPX LED Flat Panel Light is backed by a 5-year limited warranty. This warranty covers defects in materials and workmanship under normal use and service.
For warranty claims, technical support, or further assistance, please visit the official Lithonia Lighting website or contact their customer service department. Keep your proof of purchase for warranty service.
Lithonia Lighting Website: www.lithonia.com
