1. Introduction
The Active Grow 4FT T5 HO LED Grow Light is a high-efficiency, full-spectrum lighting solution designed for indoor plant cultivation. This fixture features four 25W LED tubes, providing a total PPF of 228 µmol/s, ideal for microgreens, herbs, vegetables, and various indoor plants through all growth stages. Its energy-efficient design operates at only 100W, consuming 60% less power than traditional fluorescent T5 systems while delivering full brightness with minimal heat output. The fixture boasts a high CRI 95 and a 4,000K 'sun white' spectrum, which appears natural to the eye and supports robust plant development.
2. Important Safety Instructions
- Read all instructions before using the fixture.
- This product is intended for indoor use only. Do not expose to water or high humidity.
- Ensure the power source matches the fixture's requirements (AC 120V Power).
- Do not look directly at the operating LED lights for extended periods to avoid eye strain.
- Always disconnect power before installation, cleaning, or maintenance.
- Keep out of reach of children.
- Do not attempt to modify or repair the fixture. Contact qualified personnel for service.
3. Package Contents
Your Active Grow 4FT T5 HO LED Grow Light package includes:
- 1 x Active Grow T5 HO 2.0 LED Grow Light Fixture
- 4 x 25W LED tubes
- 2 x Hanging hooks
- 1 x 120V Power cord
- Waterproof dual on-off switches (integrated)
4. Setup and Installation
4.1. Lamp Installation
The ballast bypass lamps are powered at one end only. Ensure correct orientation for proper function.
- Insert: Gently insert the lamp ends marked with 'L' and 'N' (Live and Neutral) into the fixture's wired lamp holders.
- Rotate: Rotate the lamp until it clicks securely into place.
- Click: Ensure the lamp is firmly seated and the diodes are facing downwards towards your plants.

Image: Step-by-step lamp installation process: insert, rotate, and click into place.
4.2. Hanging the Fixture
Use the included hanging hooks to suspend the fixture above your plants. The fixture is designed to be lightweight for easy installation.

Image: Attaching the hanging hooks to the fixture for suspension.
4.3. Daisy-Chainable Design
The fixture features a daisy-chainable design, allowing you to link multiple units together from a single power outlet. You can daisy-chain up to 3 units on a 120V circuit. Refer to the product specifications for higher voltage circuits.

Image: The daisy-chain port on the fixture, allowing multiple units to be linked.
4.4. Installation Video
Video: This video demonstrates the unboxing and installation process of the Active Grow T5 HO 2.0 LED Grow Light Fixture.
5. Operating Instructions
5.1. Dual Switch Control
The fixture is equipped with dual on/off switches, providing flexible light control. You can operate the outer lamps or inner lamps separately to match the specific lighting needs of your plants during different growth stages (e.g., vegetative vs. flowering).

Image: The dual switches allow for independent control of inner and outer lamps.
5.2. Sun White Spectrum
The Sun White Spectrum delivers a 4,000K light output that mimics natural sunlight, supporting all growth stages from seedling to bloom. This spectrum is optimized for clear visual inspection of plants due to its high CRI 95.

Image: Spectral distribution graph of the Sun White Spectrum.
5.3. Growing with LED T5 Grow Lights
Video: This video provides guidance on how to effectively grow indoor plants using LED T5 Grow Lights.
6. Maintenance
The Active Grow T5 HO LED Grow Light is built for longevity, rated for 30,000 hours of life. Minimal maintenance is required.
- Cleaning: Periodically wipe the fixture and LED tubes with a soft, dry cloth to remove dust and debris. Ensure the fixture is unplugged before cleaning.
- Lamp Replacement: While LED tubes have a long lifespan, individual tubes can be replaced if needed. Ensure replacement tubes are compatible ballast-bypass LED T5 HO lamps.
7. Troubleshooting
- Lamps not turning on: Ensure the lamp ends marked 'L' and 'N' are correctly inserted into the wired lamp holders of the fixture. Ballast bypass lamps are only powered at one end.
- Flickering: Verify that the power source is stable and within the specified voltage range (AC 120V).
- Reduced Light Output: Check for dust accumulation on the LED tubes and clean as per maintenance instructions.
8. Specifications
| Feature | Detail |
|---|---|
| Brand | Active Grow |
| Model Name | AG/T5HO4FIX/4FT/WS |
| Light Source Type | LED |
| Wattage | 100 watts (4 x 25W tubes) |
| Brightness | 15000 Lumen |
| Efficiency | 2.04 µmol/J |
| Color Temperature | 4000 Kelvin (Sun White Spectrum) |
| CRI | 95 |
| Product Dimensions | 46.9"L x 13.2"W x 2.4"H |
| Item Weight | 5.6 Pounds |
| Material | Polycarbonate |
| Power Source | AC 120V Power |
| Installation Type | Plug-and-Play |
| Special Feature | Daisy-chain up to 3 units on one 120V circuit |
| Control Method | Push Button (Dual Switches) |
| Indoor/Outdoor Usage | Indoor |
| Life Hours | 30,000 hours |
9. Warranty & Support
The Active Grow 4FT T5 HO LED Grow Light is backed by a 3-year warranty, ensuring reliability and performance. For technical support, troubleshooting assistance, or warranty claims, please contact Active Grow customer service.
10. Contact Information
For further assistance, please visit the official Active Grow Store on Amazon or refer to the contact details provided on the product packaging.





