1. Introduction
This manual provides comprehensive instructions for the safe installation, operation, and maintenance of your JONATHAN Y JYL9508B Quatrefoil 18-inch LED Flush Mount Light. Please read all instructions carefully before beginning installation and retain this manual for future reference.

Image 1.1: The JONATHAN Y JYL9508B Quatrefoil 18-inch LED Flush Mount Light in Brass Gold.
The JYL9508B features a distinctive quatrefoil silhouette with a scalloped shade and a brass gold trim. It is designed for flush mounting and includes four dimmable LED bulbs, providing soft, diffused light through a white diffuser panel. This fixture is suitable for various indoor spaces such as living rooms, bedrooms, kitchens, and foyers.
2. Safety Information
WARNING: To reduce the risk of fire, electric shock, or personal injury, always follow these safety precautions:
- Always turn off the power at the main circuit breaker or fuse box before beginning installation or performing any maintenance.
- Consult a qualified electrician if you are not familiar with electrical installations.
- Ensure all electrical connections are made in accordance with local codes and ordinances, as well as the National Electric Code (NEC).
- Use only the specified wattage and type of bulbs.
- Do not install this fixture in wet or damp locations. This product is for indoor use only.
- Handle the fixture and bulbs with care to prevent damage.
- This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm (Proposition 65 warning). Wash hands after handling.
3. Package Contents
Carefully unpack your fixture and identify all parts. Keep all packaging materials until you are certain all parts are present and in good condition. If any parts are missing or damaged, do not attempt to assemble or install the fixture. Contact customer service for assistance.
- Lighting Fixture (1)
- LED Bulbs (4)
- Mounting Hardware (e.g., mounting bracket, screws, wire nuts)
- Instruction Manual (1)

Image 3.1: Key features of the JYL9508B fixture, highlighting included LED bulbs and dimmer compatibility.
4. Setup and Installation
Professional installation is recommended for all ceiling light fixtures. Ensure power is OFF at the circuit breaker before proceeding.
- Prepare for Installation: Turn off the electricity at the main fuse box or circuit breaker. Clear the work area.
- Mounting Bracket Installation: Secure the mounting bracket (included) to the junction box in the ceiling using the provided screws. Ensure the bracket is firmly attached and can support the weight of the fixture.
- Electrical Connections: Connect the fixture's wires to the corresponding house wires. Typically, the black wire from the fixture connects to the black (hot) wire from the ceiling, the white wire from the fixture connects to the white (neutral) wire from the ceiling, and the ground wire from the fixture connects to the bare copper or green ground wire from the ceiling. Use wire nuts to secure connections and wrap with electrical tape for added safety.
- Secure the Fixture: Carefully lift the fixture and align the mounting holes on the fixture with the screws on the mounting bracket. Secure the fixture to the ceiling using the decorative nuts or screws provided. Ensure the fixture is flush against the ceiling.
- Install Bulbs: Screw the four included LED bulbs into the sockets. Do not overtighten.
- Attach Diffuser Panel: If applicable, attach the white diffuser panel to the bottom of the fixture according to the specific design. This panel softens the light output.
- Restore Power: Once installation is complete, turn the power back on at the circuit breaker.

Image 4.1: The JYL9508B fixture installed and illuminated, showcasing its flush mount design.
Video 4.1: A product video demonstrating the JONATHAN Y JYL9508B light fixture, showing its design and illumination. This video is provided by Jonathan Y Designs, INC.
5. Operating Instructions
The JONATHAN Y JYL9508B Flush Mount Light operates via a standard wall switch. It is compatible with LED-compatible dimmers, allowing you to adjust the light output to your desired brightness level. Ensure you use an appropriate dimmer switch for LED lighting to prevent flickering or damage to the bulbs.
- Turning On/Off: Use the wall switch connected to the fixture to turn the light on or off.
- Dimming (if applicable): If an LED-compatible dimmer switch is installed, use the dimmer control to adjust the light intensity.
6. Maintenance
Regular maintenance will help preserve the appearance and functionality of your light fixture.
- Cleaning: Always turn off the power before cleaning. Wipe the fixture with a soft, dry cloth. Do not use abrasive cleaners, solvents, or polishes as they may damage the finish.
- Bulb Replacement: Ensure the power is off and the bulbs have cooled before attempting to replace them. Use E26 Medium base LED bulbs. Refer to the specifications for recommended wattage and light output.

Image 6.1: A detailed view of the fixture's construction, useful for maintenance and cleaning.
7. Troubleshooting
If you experience issues with your light fixture, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Light does not turn on | No power to the fixture; Loose wiring; Faulty bulb; Faulty switch | Check circuit breaker; Verify wire connections; Replace bulb; Test switch functionality. |
| Light flickers | Loose bulb; Incompatible dimmer switch; Loose wiring | Tighten bulb; Ensure dimmer is LED-compatible; Check wire connections. |
| Missing parts upon arrival | Packaging error | Contact JONATHAN Y customer service immediately for replacement parts. Do not attempt installation with missing components. |
| Difficulty with installation | Complex wiring; Mounting challenges | Consult a qualified electrician for professional installation. |
If the problem persists after attempting these solutions, please contact JONATHAN Y customer support.
8. Specifications
Detailed specifications for the JONATHAN Y JYL9508B Flush Mount Light:
| Feature | Detail |
|---|---|
| Brand | JONATHAN Y |
| Model Name | JYL9508B |
| Color | Brass Gold |
| Material | Fabric, Metal (Linen shade) |
| Style | Modern |
| Light Fixture Form | Chandelier (Flush Mount) |
| Product Dimensions | 18"L x 18"W x 7.52"H (45.7cm L x 45.7cm W x 19.1cm H) |
| Indoor/Outdoor Usage | Indoor |
| Power Source | Corded Electric |
| Light Source Type | LED |
| Number of Light Sources | 4 |
| Voltage | 120 Volts |
| Light Color | Warm White |
| Color Temperature | 2700 Kelvin |
| Brightness | 420 Lumen (per bulb, total 1680 lumens) |
| Wattage | 40 watts (total) |
| Bulb Base | E26 Medium |
| Control Method | Wall Switch (App mentioned, but primary is switch) |
| Special Feature | Dimmable (with LED-compatible dimmer) |
| Item Weight | 6.53 pounds |
| Certifications | ETL, UL Listed |

Image 8.1: Dimensional drawing of the JYL9508B fixture.
9. Warranty and Support
Warranty Information: JONATHAN Y provides a 30-day manufacturer warranty for defects only. This warranty does not cover normal wear and tear. Visible damages not noted upon delivery will be considered customer damage and will not be warranted. All products are inspected upon arrival, and worn, dirty, or stained merchandise will not be accepted for warranty claims.
For warranty information or to report missing/damaged parts, please contact JONATHAN Y customer service. Contact details can typically be found on the product packaging or the official JONATHAN Y website.





