Yiisem 15.8 inch Dimmable LED Flush Mount Ceiling Light User Manual

1. Introduction

Thank you for choosing the Yiisem 15.8 inch Dimmable LED Flush Mount Ceiling Light. This modern round ceiling light features adjustable brightness and five selectable color temperatures (5CCT) ranging from 2700K to 6000K. Its ultra-thin design with a textured wood accent makes it suitable for various indoor spaces. This manual provides essential information for safe installation, operation, and maintenance of your new lighting fixture.

2. Safety Information

WARNING: To avoid electric shock, always turn off the power at the main circuit breaker or fuse box before installation, removal, or servicing.
This product must be installed in accordance with the applicable installation code by a person familiar with the construction and operation of the product and the hazards involved.
Use only with a compatible dimmer switch (not included) for brightness adjustment.
Do not attempt to modify the fixture. Any modifications may void the warranty and create safety hazards.
Ensure all connections are secure and properly insulated.
Keep the fixture away from flammable materials.

3. Package Contents

Please check to ensure all components are present and undamaged:

LED Flush Mount Ceiling Light Fixture (1)
Mounting Hardware (screws, wire nuts)
Lampshade
Hook-shaped tool (for lampshade removal)
User Manual (this document)

4. Specifications

Brand	Yiisem
Model	15.8 inch Dimmable LED Flush Mount Ceiling Light
Color	White-Dimmable
Material	Acrylic, Metal, Wood
Style	Modern
Light Fixture Form	Close to Ceiling
Color Temperature (CCT)	5CCT Selectable (2700K-6000K)
Brightness	Dimmable (10%-100% with compatible dimmer)
Average Lifetime	Approximately 40,000 hours

Dimensions of the Yiisem 15.8 inch Dimmable LED Flush Mount Ceiling Light, showing a diameter of 15.7 inches (40 cm) and a height of 2.4 inches (6 cm).

Figure 1: Product Dimensions (15.8 inch model)

5. Installation Instructions

Important: Ensure power is turned off at the circuit breaker before beginning installation.

Prepare for Installation: Turn off the power to the junction box at the circuit breaker.
Connect Wiring: Connect the fixture's wires to the corresponding household wires (typically black to black, white to white, and ground to ground) using the provided wire nuts. Ensure connections are secure.
Mount the Fixture Base: Align the fixture base with the junction box. Secure the fixture base to the ceiling using the provided mounting screws.
Select Color Temperature (CCT): Before attaching the lampshade, locate the 5CCT switch on the LED chip board inside the fixture. Adjust the switch to your desired color temperature (2700K, 3000K, 4000K, 5000K, or 6000K). This setting cannot be changed after the lampshade is installed without removing it.

Close-up view of the LED ceiling light's internal components, showing the wood material, built-in LED chips with a temperature choice switch, and the acrylic shade. The switch has settings for 5CCT.

Figure 2: Internal LED Chips and 5CCT Switch

Install the Lampshade: Carefully align the acrylic lampshade with the fixture base and twist or push it into place until it is securely fastened.
Restore Power: Turn the power back on at the circuit breaker.

6. Operation

Your Yiisem LED Flush Mount Ceiling Light offers two primary adjustable features:

Brightness Adjustment: If connected to a compatible dimmable switch (not included), you can adjust the light's brightness from 10% to 100%.
Color Temperature Selection (5CCT): The color temperature is set using a switch on the LED chip board during installation. You can choose from 2700K (Warm White), 3000K (Soft White), 4000K (Cool White), 5000K (Daylight), or 6000K (Bright White). To change the CCT after installation, the lampshade must be removed.

A bedroom illuminated by the Yiisem LED ceiling light, demonstrating its adjustable brightness feature. The image shows the light at full brightness.

Figure 3: Adjustable Brightness in a Bedroom Setting

A bedroom illuminated by the Yiisem LED ceiling light, demonstrating its 5CCT adjustable color temperature feature. The image shows the light transitioning through various color temperatures from warm to cool.

Figure 4: 5CCT Color Temperature Options in a Bedroom

7. Maintenance

Cleaning: Always turn off the power before cleaning. Wipe the fixture with a soft, dry cloth. Do not use abrasive cleaners or solvents, as they may damage the finish or electrical components.
Bulb Replacement: This fixture uses built-in LED lights that are rated for approximately 40,000 hours of average lifetime. LEDs are not user-replaceable. If the LEDs fail, the entire fixture may need to be replaced.
Lampshade Removal: To remove the lampshade for cleaning or CCT adjustment, use the included hook-shaped tool to gently pry the shade off the fixture.

8. Troubleshooting

Problem	Possible Cause	Solution
Light does not turn on.	No power to the fixture. Loose wiring connection. Faulty fixture.	Check circuit breaker. Verify all wire connections are secure (ensure power is off first). Contact customer support if wiring is correct and power is present.
Light flickers.	Incompatible dimmer switch. Loose wiring.	Ensure a compatible LED dimmer switch is used. Check wiring connections (power off).
Cannot change brightness.	No dimmer switch installed. Incompatible dimmer switch.	Install a compatible LED dimmer switch. Replace with a compatible LED dimmer switch.
Cannot change color temperature.	CCT switch not accessible.	The CCT switch is located on the LED chip board inside the fixture. The lampshade must be removed to access and adjust it.

9. Warranty and Support

Yiisem products are designed for quality and durability. For warranty information, technical support, or any questions regarding your product, please refer to the contact information provided with your purchase or visit the official Yiisem website.

Manufacturer: Yiisem

Website: Yiisem Store on Amazon