1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of the Lithonia Lighting CPRB 18LM MVOLT 40K 80CRI DWH LED Round High Bay. This product is designed for industrial and commercial applications requiring high-output illumination. Please read this manual thoroughly before installation and retain it for future reference.
2. Safety Information
WARNING: Risk of electric shock. Disconnect power before installation or servicing. Installation should 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 voltage rating (120-277V).
- Do not handle energized fixtures with wet hands or when standing on wet or damp surfaces.
- Ensure the fixture is securely mounted to prevent falling.
- Do not look directly into the LED light source when illuminated.
- Do not modify the fixture or use it for purposes other than its intended use.
3. Product Overview
The CPRB LED Round High Bay features a compact design, multi-volt driver, and a durable metal construction with a polycarbonate lens. It offers high lumen output suitable for various industrial and commercial environments.

Figure 3.1: Bottom view of the CPRB LED Round High Bay.

Figure 3.2: Product features including switchable color temperatures and adjustable lumen output.
Key Features:
- Technology: Tri-Radial polycarbonate lens for glare reduction and LED protection.
- Energy Savings: Long-life LEDs with a high-efficiency driver.
- Controls: 0-10V dimming driver (10% to 100% dimming).
- Ratings: CSA listed, Damp location listed, IP54 rated, suitable for -40°C to 55°C ambient temperatures.
- Voltage: Multi-volt driver 120-277V.
4. Setup and Installation
Before beginning installation, ensure all power to the circuit is turned off at the breaker panel. This fixture is designed for flush mount ceiling installation using the integrated hook and suspension cable.
4.1 Package Contents
- CPRB LED Round High Bay Fixture
- Suspension Cable
- Wire Nuts
- Instruction Manual (this document)
4.2 Mounting the Fixture
- Identify a suitable mounting point on the ceiling capable of supporting the fixture's weight (approximately 5.5 lbs).
- Securely attach the provided suspension cable to the mounting point.
- Hang the fixture using the integrated hook onto the suspension cable. Ensure the hook is fully engaged and stable.

Figure 4.1: Top view of the fixture showing the mounting hook and wiring.
4.3 Electrical Connections
- Connect the fixture's black wire to the building's hot (L1) wire.
- Connect the fixture's white wire to the building's neutral (N) wire.
- Connect the fixture's green wire to the building's ground (GND) wire.
- For 0-10V dimming functionality, connect the fixture's purple wire to the dimmer's positive (+) control wire and the pink wire to the dimmer's negative (-) control wire. If dimming is not used, cap these wires individually with wire nuts.
- Ensure all connections are secure using the provided wire nuts or other approved connectors.
5. Operating Instructions
The CPRB High Bay fixture offers adjustable lumen output and switchable color temperatures. These settings are configured via switches located on the top of the fixture.
5.1 Adjusting Lumen Output
Locate the lumen output switch on the top of the fixture. This switch typically has three positions: Low, Medium, and High. Select the desired brightness level before restoring power to the fixture.
5.2 Switching Color Temperature
Locate the color temperature switch on the top of the fixture. This switch allows selection between 4000K (Cool White) and 5000K (Daylight). Select the desired color temperature before restoring power to the fixture.

Figure 5.1: Switches for adjusting lumen output and color temperature.

Figure 5.2: Color Temperature Guide illustrating different light appearances.
6. Maintenance
The CPRB LED High Bay fixture requires minimal maintenance. Regular cleaning can help maintain optimal light output.
- Cleaning: Ensure power is disconnected before cleaning. Use a soft, dry, or slightly damp cloth to wipe the exterior of the fixture. Do not use abrasive cleaners or solvents.
- LEDs: The LEDs are integrated and not user-serviceable. Do not attempt to replace individual LEDs.
- Inspection: Periodically inspect the fixture and wiring for any signs of damage or wear. Address any issues promptly.
7. Troubleshooting
If the fixture is not operating correctly, refer to the following troubleshooting guide:
| Problem | Possible Cause | Solution |
|---|---|---|
| Fixture does not illuminate | No power supply Loose wiring connection Incorrect voltage | Check circuit breaker and wall switch. Verify all wire connections are secure. Ensure supply voltage matches fixture rating (120-277V). |
| Light output is too low/high | Lumen output switch set incorrectly | Adjust the lumen output switch on the fixture to the desired setting. |
| Light color is not desired | Color temperature switch set incorrectly | Adjust the color temperature switch on the fixture to 4000K or 5000K. |
| Dimming not working | Dimming wires not connected Incompatible dimmer | Ensure purple and pink dimming wires are correctly connected to a 0-10V dimmer. Verify dimmer compatibility with 0-10V LED drivers. |
8. Specifications
| Specification | Detail |
|---|---|
| Brand | Lithonia Lighting |
| Model Number | CPRB 18LM MVOLT 40K 80CRI DWH |
| Size | 13-Inch |
| Brightness | 18000 Lumens |
| Color Temperature | 4000K Cool White (Switchable to 5000K Daylight on some models) |
| Voltage | 120-277V (Multi-Volt) |
| Wattage | 130 Watts |
| Material | Metal housing, Polycarbonate lens |
| Dimensions (L x W x H) | 14.57" x 5" x 3.16" |
| Item Weight | 5.5 Pounds |
| Control Method | 0-10V Dimming |
| Indoor/Outdoor Usage | Indoor (Damp location listed) |
| Operating Temperature | -40°C to 55°C |
| Certifications | CSA listed, IP54 rated, DLC 5.1 Premium, Energy Star, FCC, RoHS, UL |
| UPC | 196182615429 |
9. Warranty
This Lithonia Lighting product is covered by a 5-year limited warranty. For detailed warranty terms and conditions, please refer to the official warranty statement provided with your purchase or contact Lithonia Lighting customer support.
10. Support
For technical assistance, replacement parts, or further information regarding your Lithonia Lighting product, please contact customer support:
- Manufacturer: Acuity Brands Lighting
- Website: www.acuitybrands.com (Parent company of Lithonia Lighting)
- Refer to the official Lithonia Lighting website for contact information and support resources.