1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your GEYUEYA Home LED Deck Light Kits. These low-voltage, waterproof lights are designed for outdoor and indoor decorative and functional lighting, such as on decks, stairs, and pathways. Please read this manual thoroughly before installation and retain it for future reference.

This image displays the complete GEYUEYA Home LED Deck Light Kit, including 16 individual recessed lights, the power adapter, and an example of the lights illuminating outdoor steps.
2. Safety Information
Observe the following safety precautions to prevent injury or damage to the product:
- Ensure the power supply is disconnected before installation or maintenance.
- This product operates on DC 12V low voltage. Do not connect to AC voltage, as this will cause damage.
- Installation should be performed by a qualified individual if you are unsure about electrical wiring.
- Do not modify the product in any way. Unauthorized modifications may void the warranty and pose safety risks.
- Keep children away from the installation area and electrical components.
- Ensure all connections are secure and waterproof to maintain IP67 rating.
3. What's in the Box
Verify that all components are present before beginning installation:
- 16 x LED Deck Lights
- 1 x 12W Power Adapter
- Instruction Manual

This image displays the full contents of the product package, showing the 16 LED deck lights individually wrapped, the 12W power adapter, and the included instruction manual.
4. Specifications
| Feature | Detail |
|---|---|
| Brand | GEYUEYA Home |
| Model Number | D31B21-16S |
| Color | Black |
| Material | Acrylonitrile Butadiene Styrene, Stainless Steel |
| Light Fixture Form | Recessed |
| Product Dimensions | 1.22"L x 0.86"W x 0.72"H (31mm diameter x 18.5mm height) |
| Mounting Hole Size | Φ0.94" (24mm) |
| Power Source | DC |
| Voltage | 12 Volts (DC) |
| Wattage per Light | 0.6W |
| Total Power Adapter | 12W (supports up to 16 lights) |
| Light Color | Warm White (3000-3500K) |
| Brightness | 8-10 Lumens per light |
| Water Resistance Level | IP67 Waterproof |
| Average Life | 50,000 Hours |
| Certifications | CE, RoHS |
5. Installation Guide
Follow these steps for proper installation of your LED Deck Light Kit:
5.1 Planning and Preparation
- Determine the desired locations for each light, ensuring adequate spacing (recommended 3.28 ft between lights).
- Ensure the installation surface is suitable for drilling and can accommodate the light's dimensions.
- Confirm the power adapter can reach all lights with the provided cable lengths (2 x 1.64ft per light). Extension cables (B0CWLLRJ77, B0CWLKQSHW, B0CWLCB7S3) may be purchased separately if needed.

This diagram provides critical dimensions for the deck light (diameter 31mm, height 18.5mm, cutting hole 24mm) and illustrates how to correctly align the arrows on the male and female waterproof connectors during installation.
5.2 Step-by-Step Installation
- Drill Holes: Using a 24mm (0.94 inch) drill bit, carefully drill holes at your marked locations.
- Insert Lights: Place the bottom line of each LED deck light into the drilled hole. The light features a buckle mechanism to grip the surface securely.
- Connect Cables: Connect the male and female waterproof connectors of the lights. Ensure the arrows on the connectors are aligned for a proper and secure connection. The lights are wired in parallel, meaning if one light fails, the others will continue to function.
- Connect Power Supply: Connect the entire string of lights to the provided 12W power adapter. Plug the power adapter into a suitable power outlet.

This step-by-step guide visually explains the installation process: 1. Drill a 24mm hole. 2. Insert the light body into the hole. 3. Connect the cables, ensuring arrow alignment. 4. Connect the entire system to the power supply.

This collage shows the versatility of the LED deck lights installed in different outdoor settings, such as illuminating snowy steps, deck edges, and garden areas, enhancing safety and ambiance.
6. Operating Instructions
Once installed and connected to the power supply, the GEYUEYA Home LED Deck Lights will illuminate. There is no remote control or switch on the lights themselves; operation is controlled by the power source. For continuous illumination, ensure the power adapter is plugged in. To turn off the lights, simply unplug the power adapter or use a switched outlet.
7. Maintenance
The GEYUEYA Home LED Deck Lights are designed for durability and require minimal maintenance.
- Cleaning: Periodically clean the surface of the lights with a soft, damp cloth to remove dirt or debris. Avoid using abrasive cleaners or solvents.
- Inspection: Regularly inspect cables and connections for any signs of wear, damage, or loose connections. Ensure waterproof seals remain intact.
- Environmental Protection: The IP67 rating ensures protection against dust and water immersion. However, avoid prolonged submersion or high-pressure water jets directly on the lights.

This image highlights the IP67 waterproof rating of the deck lights, demonstrating their resilience against water, sun, snow, and dust, making them suitable for various outdoor conditions.
8. Troubleshooting
If you encounter issues with your LED Deck Light Kit, refer to the following table:
| Problem | Possible Cause | Solution |
|---|---|---|
| Lights do not turn on. | No power to the adapter. Loose cable connection. Faulty power adapter. | Check the power outlet and adapter connection. Ensure all light connectors are securely aligned. Test the power adapter with another compatible device if possible. |
| Some lights are not working. | Loose connection to a specific light. Damaged individual light. | Check the connections for the non-working lights. Ensure arrows are aligned. Since lights are parallel, a single faulty light will not affect others. Replace the damaged light if necessary. |
| Lights are flickering. | Unstable power supply. Incorrect voltage (AC instead of DC). Loose connection. | Ensure the power outlet provides stable power. Verify the power adapter is the correct DC 12V type. Do not use AC. Check all cable connections for tightness. |
| Lights are dim. | Dirt or debris on light surface. Power adapter overloaded (too many lights). | Clean the light surfaces. Ensure the total wattage of connected lights does not exceed the 12W power adapter capacity. |
9. Warranty and Support
GEYUEYA Home products come with a limited warranty. For specific warranty details, please refer to the documentation included with your purchase or contact customer service. All deck lights are CE and RoHS certified, ensuring product quality and safety.
If you have any questions, require technical assistance, or need to report a problem, please contact GEYUEYA Home customer service through the retailer's platform where the product was purchased. Please provide your model number (D31B21-16S) and purchase date for faster service.