1. Introduction
This manual provides comprehensive instructions for the installation, operation, maintenance, and troubleshooting of your Lithonia Lighting CPANL 2x4 LED Flat Panel Light. Please read this manual thoroughly before installation and retain it for future reference. This LED flat panel light is designed for modern, energy-efficient illumination in various indoor settings.

Image 1: Lithonia Lighting CPANL 2x4 LED Flat Panel Light
2. Safety Information
WARNING: Risk of electric shock. Disconnect power at the fuse or circuit breaker before installing or servicing.
- Always turn off the power supply at the main circuit breaker before beginning any electrical work.
- Installation must be performed by a qualified electrician in accordance with all national and local electrical codes.
- Ensure the supply voltage is compatible with the fixture's requirements (120 Volts).
- Do not attempt to modify the fixture. Any modifications may void the warranty and create a safety hazard.
- Wear appropriate personal protective equipment (PPE) during installation.
3. Features
- Switchable Color Temperature (SWW): Easily select between 3500K (Neutral), 4000K (Cool), and 5000K (Daylight) to suit your environment.
- Energy Efficient LED: Long-life LEDs coupled with a high-efficiency driver provide superior illumination and reduce energy costs.
- Triac Dimming: Compatible with most standard Triac dimmer switches for adjustable light output.
- Durable Construction: Certified for damp locations, CSA, IC, and DLC, ensuring long life and high durability with over 60,000 hours of performance.
- Versatile Installation: Includes standard integral T-Bar clips for T-Grid ceilings and a DCMK 224 bracket for direct surface mounting. Slim profile accommodates tight plenums.
4. Package Contents
Verify that all components are present and undamaged before proceeding with installation:
- CPANL 2x4 LED Flat Panel Light Fixture
- Direct Ceiling Mount Kit (DCMK 224 bracket)
- Installation Instructions (this manual)
5. Setup and Installation
Follow these steps for proper installation. Refer to the included installation guide for detailed diagrams.
- Turn Off Power: Ensure power is turned off at the circuit breaker before installation.
- Mount Bracket: For surface mounting, use the included DCMK 224 bracket. Mark and drill locations, then secure the hanger brackets to the ceiling with appropriate fasteners (e.g., toggle bolts for drywall).
- Attach Tether Cables: Mount the CPANL to the hanger brackets and attach the tether cables for support during wiring.
- Electrical Connections: Make all electrical connections according to local code. Ensure proper grounding.
- Select Color Temperature: Before final mounting, select your desired color temperature (3500K, 4000K, or 5000K) using the switch located on the fixture.
- Secure Panel: Lift the panel and pivot it to latch into the mounting frame.

Image 2: Installation Guide - Easily Install In 5 Simple Steps

Image 3: Mounting options for recessed, suspended, or surface box mounting.
Installation Video
Video 1: Lithonia Lighting CPANL Panel Light 2x4 Spin Video 2022. This video provides a 360-degree view of the product, showcasing its design and form factor.
6. Operating Instructions
The CPANL LED Flat Panel Light offers adjustable color temperature and is compatible with dimming switches.
- Color Temperature Selection: Before final installation, locate the CCT (Correlated Color Temperature) switch on the fixture. Choose between 3500K (Neutral White), 4000K (Cool White), or 5000K (Daylight) to achieve your desired ambiance.
- Dimming: This fixture supports Triac dimming. Connect to a compatible Triac dimmer switch (sold separately) to adjust the light intensity.

Image 4: Illustration of switchable color temperatures (3000K, 4000K, 5000K) available with the fixture.
7. Maintenance
To ensure optimal performance and longevity of your LED flat panel light, follow these simple maintenance guidelines:
- Cleaning: Ensure power is off before cleaning. Use a soft, dry, or slightly damp cloth to wipe the surface of the fixture. Avoid abrasive cleaners, solvents, or harsh chemicals that could damage the finish or electrical components.
- Inspection: Periodically inspect the fixture for any signs of damage, loose wiring, or unusual operation. If any issues are found, disconnect power and consult a qualified electrician.
- No Bulb Replacement: This fixture uses integrated LEDs, which do not require bulb replacement.
8. Troubleshooting
If you experience issues with your LED flat panel light, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Light does not turn on | No power supply, loose wiring, faulty switch | Check circuit breaker, verify wiring connections, test switch functionality. |
| Light flickers | Incompatible dimmer, loose wiring, power fluctuations | Ensure dimmer is Triac compatible, check wiring, consult electrician for power issues. |
| Incorrect color temperature | CCT switch set incorrectly | Adjust the CCT switch on the fixture to the desired setting. |
If the problem persists after attempting these solutions, contact a qualified electrician or Lithonia Lighting customer support.
9. Specifications
Detailed technical specifications for the CPANL 2x4 LED Flat Panel Light:
- Brand: Lithonia Lighting
- Model Name: CPANL LED
- Item Model Number: CPANL 2X4 40LM SWW7 120 TD DCMK
- Size: 2-Foot X 4-Foot (47.8"L x 23.8"W x 1.1"H)
- Light Output Maximum: 4000 Lumens
- Color Temperature: Switchable (3500K Neutral / 4000K Cool / 5000K Daylight)
- Wattage: 37 watts
- Voltage: 120 Volts
- Material: Alloy Steel, Aluminum, Polycarbonate, Acrylic
- Finish Type: Matte
- Installation Type: Surface Mount (DCMK 224 bracket included)
- Indoor/Outdoor Usage: Indoor
- Special Feature: Adjustable (CCT)
- Certifications: cCSAus safety listing, CSA certified, IC certified, DLC certified
- Lumen Maintenance: Greater than 70% LED lumen maintenance at 60,000 hours
- Item Weight: 13.6 Pounds
- UPC: 194995063246

Image 5: Product dimensions for the CPANL 2x4 LED Flat Panel Light.
10. Warranty and Support
This Lithonia Lighting CPANL LED Flat Panel Light is covered by a 5-year manufacturer limited warranty. For warranty claims or technical support, please refer to the contact information provided with your purchase or visit the official Lithonia Lighting website.





