1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Hygger 24/7 Mode Submersible Aquarium LED Light, Model 8in 6W. Please read this manual thoroughly before use to ensure proper function and safety.

Image 1.1: Hygger 24/7 Mode Submersible Aquarium LED Light with its inline controller.
2. Safety Instructions
- Always disconnect power before performing any maintenance or installation.
- Ensure the power cord and adapter are not damaged. Do not operate if damaged.
- This product is designed for indoor aquarium use only.
- The light unit is IP68 waterproof and can be submerged, but the controller and power adapter are not. Keep them dry.
- Do not attempt to disassemble or modify the light unit or controller.
- Keep out of reach of children.
3. Package Contents
Please check the package for the following items:
- Hygger 24/7 Mode Submersible Aquarium LED Light (8in 6W)
- Inline Controller
- Power Adapter
- Suction Cups for mounting

Image 3.1: Diagram illustrating the components of the Hygger LED light, including the light bar, controller, power adapter, and suction cups.
4. Product Features
- 24/7 Natural Mode: Simulates a natural light cycle with gradient orange (sunrise), white (daylight), and blue (moonlight) illumination.
- DIY Mode: Allows customization of lighting duration (6h, 10h, 12h), brightness (5 levels), and color (White, Red, Blue, Green, Purple, Orange, Cyan, Cycle Color).
- Versatile Installation: Can be used as a submersible light, fixed under a fish tank cover, or placed behind the outside of the fish tank as a hidden atmosphere light.
- Waterproof Design: IP68 rated for safe submersion.
- Eye and Fish Protection: Soft light with a high color rendering index (CRI: 79) to reduce discomfort from stroboscopic effects.
- Durable LEDs: Utilizes high-quality 2835 + 5050 model lamp beads with a long service life of at least 50,000 hours.
- Separable Adapter: Allows for easy replacement of the adapter without needing to replace the entire light unit.

Image 4.1: Detailed view of the LED light bar, highlighting the 6W power and premium 5050 and 2835 LEDs for bright illumination.
5. Setup Instructions
- Unpack: Carefully remove all components from the packaging.
- Choose Placement: Decide on the desired placement for your LED light. Options include:
- Submersible: Use the provided suction cups to attach the light bar to the inside of your aquarium glass. Ensure it is fully submerged.
- Under Tank Cover: Attach the light bar to the underside of your aquarium hood using the suction cups or other suitable fasteners.
- Hidden Atmosphere Light: Place the light bar behind the outside of the fish tank, using the suction cups to secure it to the back glass.
- Connect Power: Connect the light bar cable to the inline controller, and then connect the controller to the power adapter. Ensure connections are secure.
- Plug In: Plug the power adapter into a suitable electrical outlet.

Image 5.1: Light installed under an aquarium cover.

Image 5.2: Light used as a hidden atmosphere light behind the tank.

Image 5.3: Various installation methods for the light, including submersible use.
6. Operating Instructions
The light features an inline controller with several buttons for operation:
- TIMER Key: Sets the lighting duration for DIY mode (6h, 10h, or 12h).
- ON-OFF/M Key: Toggles the light on/off and cycles through available colors in DIY mode.
- Up/Down Arrows: Adjusts brightness levels (5 kinds) in DIY mode.
- 24/7 Key: Activates or deactivates the 24/7 Natural Mode.

Image 6.1: The inline controller with its various function buttons.
6.1. 24/7 Natural Mode
This mode simulates a natural light cycle throughout the day:
- 6 AM - 8 AM: Gradient Orange light (sunrise simulation).
- 8 AM - 6 PM: Gradient White light (daylight simulation).
- 6 PM - 10:50 PM: Gradient Blue light (moonlight simulation).
- Other times: Lights are off.
The overall default time period can be delayed or advanced by adjusting the initial setup time.

Image 6.2: Visual representation of the 24/7 default lighting cycle.
6.2. DIY Mode
To customize your lighting:
- Press the TIMER key to select a lighting duration: 6 hours, 10 hours, or 12 hours.
- Press the ON-OFF/M key to cycle through the available colors: White, Red, Blue, Green, Purple, Orange, Cyan, or a continuous color cycle.
- Use the Up/Down Arrows to select one of 5 brightness levels.

Image 6.3: Illustration of the DIY mode, demonstrating selectable time, color, and brightness settings.
7. Maintenance
- Regularly clean the light bar to prevent algae buildup, which can reduce light output. Disconnect power before cleaning.
- Use a soft cloth to wipe the light bar. Do not use abrasive cleaners or solvents.
- Ensure the power adapter and controller remain dry and free from water splashes.
- Check power cords for any signs of damage periodically.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Light does not turn on. | No power, loose connection, or faulty adapter. | Check power outlet, ensure all connections are secure. Verify adapter is working. |
| Light flickers or changes color unexpectedly. | Unstable power supply or controller malfunction. | Ensure stable power. Try resetting the light by unplugging and replugging. |
| 24/7 mode timing is incorrect. | Initial setup time was not correctly set or adjusted. | Adjust the initial time setting on the controller to synchronize with your desired cycle. |
9. Specifications
| Parameter | Value |
|---|---|
| Model | 8in 6W |
| Power | 6W |
| LED Quantity | 36 PCS (White: 17, Blue: 5, Red: 2, RGB: 12) |
| CRI (Color Rendering Index) | 79 |
| Application (Fish Tank Length) | 8” - 15” |
| Power Cord Length | 6 ft + 4.9 ft |
| Input Voltage | AC100-240V |
| Output Voltage | DC20V |
| Kelvin (White) | 6500K |
| Blue Wavelength | 455nm |
| Red Wavelength | 620nm |
| Lumens | 609.8lm |
| Water Resistance Level | IP68 (Light bar only) |
| Material | Plastic, Metal |
| Item Weight | 9.2 ounces |

Image 9.1: 8-inch model.

Image 9.2: 12-inch model.

Image 9.3: 15.9-inch model.

Image 9.4: 19.9-inch model.

Image 9.5: 23.4-inch model.

Image 9.6: 27.4-inch model.
10. Warranty and Support
Hygger products are designed for reliability and performance. For warranty information or technical support, please refer to the contact details provided with your purchase or visit the official Hygger website. Keep your purchase receipt as proof of purchase for warranty claims.





