Introduction
This manual provides detailed instructions for the safe installation, proper operation, and routine maintenance of the Nora Lighting NL-426W 4 Inch Flat Frosted Lens Trim. This trim is designed for use with 4-inch recessed lighting housings. It is compatible with both LED lamps and traditional incandescent bulbs, as well as IC (Insulated Ceiling) and Non-IC housings. The trim supports both low voltage (12V) and line voltage (120V) applications. Please read all instructions carefully before proceeding with installation or use.
Note: This fixture requires one 50-watt GU5.3 MR16 bulb (not included). The fixture is not capable of being dimmed. It is CUL rated for wet locations, making it suitable for various indoor and outdoor environments.
Safety Information
- Always turn off power at the circuit breaker or fuse box before installing, servicing, or cleaning the fixture.
- Consult a qualified electrician if you are unsure about the installation process.
- Ensure all electrical connections are made in accordance with local codes and ordinances.
- Do not exceed the maximum wattage specified for the bulb (50 watts).
- This product is designed for use with specific recessed housings. Verify compatibility before installation.
- Avoid touching the bulb directly with bare hands, as oils can reduce bulb life. Use a clean cloth or gloves.
Package Contents
Verify that all components are present before beginning installation:
- One (1) Nora Lighting NL-426W 4 Inch Flat Frosted Lens Trim with White Reflector
Setup and Installation
Follow these steps to install the recessed lighting trim:
- Turn Off Power: Before starting, ensure the power to the recessed housing circuit is turned off at the main electrical panel.
- Prepare Housing: If installing into an existing recessed housing, remove any old trim. Ensure the housing is clean and free of debris.
- Install Bulb: Carefully insert the required 50-watt GU5.3 MR16 bulb into the socket within the recessed housing. Do not overtighten.
- Connect Trim: Align the trim with the recessed housing. The NL-426W trim uses trim clips for secure mounting. Gently push the trim upwards into the housing until the clips engage and hold the trim flush against the ceiling.
- Verify Fit: Ensure the trim is securely seated and flush with the ceiling surface.
- Restore Power: Once installation is complete, restore power at the circuit breaker.

An image showing the Nora Lighting NL-426W 4-inch flat frosted lens trim. The trim features a white outer ring and a frosted lens in the center, designed for recessed lighting applications.
Operating Instructions
Operating the Nora Lighting NL-426W trim is straightforward:
- Ensure the trim is correctly installed and a compatible bulb is inserted.
- Turn on the electrical power to the circuit at the wall switch or circuit breaker.
- The light will illuminate.
Important: This fixture is not designed for dimming. Attempting to use it with a dimmer switch may cause damage to the fixture or bulb, or result in improper operation.
Maintenance
Regular maintenance helps ensure the longevity and performance of your trim:
- Cleaning: Turn off power before cleaning. Use a soft, dry, or slightly damp cloth to wipe the trim. Do not use abrasive cleaners, solvents, or polishes, as these can damage the finish.
- Bulb Replacement: Turn off power before replacing the bulb. Allow the bulb to cool completely before handling. Carefully remove the old bulb and insert a new 50-watt GU5.3 MR16 bulb.
- Inspection: Periodically inspect the trim for any signs of damage or loose connections. If any issues are found, turn off power and consult a qualified electrician.
Troubleshooting
If you encounter issues with your Nora Lighting NL-426W trim, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Light does not turn on | No power to the fixture Bulb is faulty or not installed correctly Loose wiring connection | Check circuit breaker or wall switch Replace bulb or ensure it is seated properly Turn off power and check wiring connections (consult electrician if unsure) |
| Light flickers | Loose bulb Incorrect bulb type Voltage fluctuations | Ensure bulb is securely tightened Verify bulb is a 50W GU5.3 MR16 Consult an electrician to check household wiring |
| Trim does not sit flush | Trim clips not engaged Obstruction in housing | Gently push trim firmly into housing until clips engage Remove trim and check for any obstructions inside the housing |
Specifications
| Brand: | Nora Lighting |
| Model: | NL-426W |
| Trim Size: | 4 inches |
| Dimensions (H x W x D): | 2 inches x 5 inches x 5 inches |
| Product Weight: | 1 lbs |
| Material: | Aluminum |
| Finish: | White (Trim), Specular White (Reflector) |
| Number of Bulbs: | 1 |
| Max Watts Per Bulb: | 50 watts |
| Bulb Base: | GU5.3 |
| Bulb Shape: | MR16 |
| Voltage: | 12V (Low Voltage) or 120V (Line Voltage) |
| Dimming Capability: | No |
| Indoor/Outdoor Usage: | Indoor, Outdoor (CUL rated for wet locations) |
| Installation Type: | Flush Mount |
| Required Assembly: | No |
Warranty
The Nora Lighting NL-426W 4 Inch Flat Frosted Lens Trim is covered under a 1-year limited warranty. This warranty covers defects in materials and workmanship under normal use. For complete details regarding warranty terms, conditions, and claim procedures, please refer to the official Nora Lighting website or contact their customer support directly. Proof of purchase may be required for warranty claims.
Support
For technical assistance, product inquiries, or customer service, please contact Nora Lighting through their official channels:
- Online: Visit the official Nora Lighting Store on Amazon for product information and support resources.
- Manufacturer Website: Refer to the Nora Lighting corporate website for comprehensive support, FAQs, and contact information.