Grower's Choice ROI-E420 LED Grow Light

Bulk Discounts: 1 Light
Sale price$599


ROI-E420 LED Grow Light

Happy Hydro's top pick for big yields in 3 x 3' to 3.5 x 3.5' grow spaces.

The Important Stuff: 3.5' x 3.5' bloom footprint, 4 x 4' veg footprint, 420 Watts, 1090 μmol/s PPF, full spectrum, built-in dimmer, 120v-240v, 3 year warranty

Introducing the ROI-E420 full spectrum, compact horticulture LED fixture. Utilizing Grower's Choice proven 3K full PAR spectrum, this LED is perfect for professional cultivators and grow enthusiasts alike, who require a powerful LED fixture with a lower profile frame. This new, sleek LED is also perfect for the hobby growers or entry level professional cultivators who want to maximize their yields while working with limited space. This fixture performs best using a 4ft x 4ft veg and 3.5ft x 3.5ft flowering footprint, perfect for compact gardens and cultivation tents. 

Grower’s Choice New ROI-E420 LED Grow Light


Balanced spectrum, Incorporating Grower's Choice famous GC-3K Full Phase Spectrum for superior growing power with best possible LED diodes available.

1090 μmol/s Total Output  |  2.6 μmol/s System Efficacy

Up to 40% energy saving  |  40% less HVAC requirement

With onboard dimming function, growers can set the ideal intensity at any stage of plant growth for optimal photosynthesis activation. Also, it is compatible with most lighting controllers including Grower's Choice Master Lighting controller.

Precisely designed to deliver uniform levels of photosynthetic flux density, (PPFD).

Industrial grade manufactured with Osram Top Bin Diodes and ultra efficient driver.

POWER (120-277 VAC)
AMPERAGE (4.0A, 2.5A, 2.0A, 1.8A)


Light Source: LED

Spectrum: GC-3K Full Phase

PPF: 1090 PPF

Input Power: 420W

Efficacy: 2.6 μmol/s

Fixture Dimension/Weight: 35.3"L x 34.6"W x 3.2"H/19.4lbs | 89.6cm L x 88cm W x 8.1cm H/8.8kg

Mounting Height: 6"-24" depending on application

Thermal Management: Passive

Dimming: 0-10V

Light Distribution: 1200

Lifetime: L90:>54,000 hrs

Power Factor: >90%

Certifications: IP65, CE, UL 8800, UL 1598, DLC


Growers Choice offers an incredible 3 year warranty on their light. If you ever have issues related to a manufacturer defect they will send you a shipping label so you can return it for free. Can't go without your light during the warranty claim? No problem, put a deposit down and they will ship you a new light before having you return the other one.

Total Control:

The ROI-E420 is controllable with Grower's Choice Master Controllers and is compatible with all quality master controllers. Cultivators can set the fixture to turn off and on at desired times, program sunrise/sunset settings, program dimming options and set protective fail safes to dim or turn off fixtures in the event of excessive room temperatures, such as in the event of HVAC failure, potentially saving gardens from heat damage.

Happy Hydro Grower's Choice Master Control

Output Range: 10%~115%

Number Of Ballasts Per Output: 100 Max

Max Cable Length Per Group: 100M

Control Voltage Outputs: 2 Group, A/B

Temperature Sensor: 2 Group, A/B

Overheat Protection: Yes

Sunrise/Sunset Period: Yes

Setup Ballast Type: 1000W/945W/750W/630W/600W/500W/315W

Alarm Port: 2 Group, NO/NC

ECM Port: 2 Group, NO/NCCE

Input Voltage: 5VDC // 2000mA

Don't wait for your next crop. Learn about our financing  👉 here.

Shipping Info

Why Buy From Us?

Payment & Security

American Express Apple Pay Bitcoin Bitcoin Cash DAI Diners Club Discover Dogecoin Elo Ethereum Google Pay JCB Litecoin Mastercard PayPal Shop Pay USDC Venmo Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Picked by Our Garden Experts

Recently Viewed