- Master Controller
- Power Adapter (DC5V/2000mA)
- 2 x 5m Temperature Sensor Cords
- 2 x 5m Controller Wires (RJ9 to RJ14)
- User Manual
Grower's Choice LED Grow Light Master Controller
starting from 0% interest financing from
/mo.
- Up to 200 fixtures across two independent zones
- Integrated thermal probes trigger automatic dimming during heat spikes
- Controls any Grower's Choice ROI series LED via RJ14 daisy chain
- 3-year warranty
- View More Details
Earn 250 points for shopping and get $2.50 off your next order. Join Harvest Club for free.
Free Shipping On Most Items*
To the lower 48
Transparent Pricing
Backed w/ price match guarantee
4.8/5 Rating
1938+ verified reviews
Secure Checkout
SSL encrypted payments
More in this Series
VOLUME PRICING
Commercial & Bulk Purchasing
We support operations & licensed facilities with volume pricing, dedicated account managers, and custom equipment consultation.
Who This Is For
- You are consolidating your controls because managing separate timers for two rooms is a constant manual chore.
- You are adding thermal protection because you want the lights to dim automatically if your HVAC ever fails mid-cycle.
What We Found
- The touchscreen is surprisingly responsive even with gloves on, which is a rare find for grow room controllers.
- We love the dual zone feature for managing mother plants and flowering crops from a single interface.
- The 115 percent boost setting is a solid tool for pushing light intensity during the final weeks of a cycle.
What Users Say
- Operators who manage two rooms say the dual zone setup cut their daily monitoring time by more than half.
- Users who experienced HVAC failures report the thermal probes saved their crop by dimming lights automatically.
- Cultivators say the gradual sunrise setting makes the morning transition much smoother for their sensitive plants.
Grower's Choice LED Grow Light Master Controller
Tired of manually adjusting multiple lights? The Grower's Choice Master Controller is the central command hub you need, simplifying control and unlocking the full potential of your lighting setup. This is one of the most essential grow light controllers for any serious cultivator.
This powerful, dual-channel controller allows you to manage up to 200 fixtures across two separate, independently programmed grow areas. Daisy-chain up to 100 lights per zone, making it perfect for managing complex setups with various LED grow lights like the popular ROI-E720 LED Grow Light.
Navigate settings with ease using the intuitive LCD touchscreen. The controller's advanced timer lets you simulate natural sunrise and sunset cycles by gradually dimming and brightening your lights, reducing stress on your plants. For ultimate peace of mind, built-in dual thermal probes monitor your grow room temperature and will automatically dim the lights to protect your crop from excessive heat in case of an HVAC failure.
What's Included
Features
🌅
Sunrise & Sunset Simulation
Reduces plant stress by mimicking natural light cycles.
👆
Intuitive LCD Touchscreen
Easily navigate settings and schedules with a user-friendly interface.
➗
Dual Zone Control
Manage up to 200 lights across two independent grow areas (100 per zone).
🌡️
Thermal Protection
Dual probes monitor temperature and automatically dim lights to prevent crop damage.
Specifications
| Specification | Value |
|---|---|
| Output Range | 10% - 115% |
| Number of ballasts per output | 100 Max |
| Max cable length per group | 100M |
| Control Voltage Outputs | 2 groups, A/B |
| Temperature Sensor | 2 groups, A/B |
| Overheat Protection | Yes |
| Sunset/Sunrise Period | Yes |
| Setup ballast type | 1000W/945W/750W/630W/600W/500W/315W |
| Alarm Port | 2 groups, NO/NC |
| ECM Port | 2 groups, A/B |
| Input Voltage | 5VDC / 200mA |
| Weight | 0.5kg |
| Warranty | 3 Years |
Support & Manuals
Warranty
The Grower's Choice Master Controller comes with a three-year warranty. This warranty does not apply to second-hand lamps or lamps purchased pursuant to casual sales. All warranty claims must be directed to the retail store where the lamp was purchased. Except as provided in this warranty, Grower’s Choice makes no representation or warranty of any kind, express, implied or statutory, as to any matter whatsoever, including without limitation merchantability, fitness for a particular purpose, non-infringement or otherwise. Grower’s Choice shall not under any circumstances be responsible for any loss or damage, indirect, special, ordinary, exemplary, consequential or otherwise, arising out of the purchase or use of the lamps, except as expressly provided in this warranty. Under no circumstances shall Grower’s Choice’s liability of any kind exceed the purchase price of the lamp in question.
FAQs
How many lights can the Master Controller manage?
The Grower's Choice Master Controller can manage a total of 200 lights. It features two independent channels (zones), each capable of controlling up to 100 daisy-chained fixtures.
Can I control two separate grow rooms with one controller?
Yes, absolutely. The dual-channel design allows you to set independent lighting schedules and temperature parameters for two separate grow areas, making it perfect for managing both a vegetative and a flowering room from a single device.
What is the sunrise/sunset feature?
This feature gradually ramps the light intensity up at the beginning of your light cycle and ramps it down at the end. This mimics natural daylight changes, which can help reduce shock and stress for your plants, leading to healthier growth.
How does the overheat protection work?
The controller includes two thermal probes to place in your grow areas. If the temperature exceeds a safety limit that you set, the controller will automatically dim or shut off the connected lights to prevent heat damage to your plants, providing a critical failsafe in case of HVAC or ventilation failure.
Is this controller compatible with all Grower's Choice lights?
This controller is designed to work seamlessly with Grower's Choice lighting systems that use the RJ9/RJ14 controller ports. It is fully compatible with popular models like the ROI-E900. We always recommend checking the specifications of your specific light fixture for compatibility.
Where can I learn more about setting up grow lights?
For a comprehensive overview of different lighting configurations and best practices, we recommend reading our guide on the best indoor grow light setups. It provides valuable insights that can help you maximize your yield.
Happy To Help
Questions About This Product?
Our specialists are happy to help. Call us or send a message and we'll get back to you within one business day (most of the time within a few hours.)
Why Trimleaf
Equipping home growers, craft producers, and commercial operations across North America since 2016.
10+
Years of Specialist Knowledge
4.8★
Over 1,900 Verified Reviews
50,000+
Growers Served
120+
Top Equipment Brands in Stock