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Free Shipping on most orders over $175 | Sales Tax in NJ only
Free Shipping on most orders over $175 | Sales Tax in NJ only
Grower's Choice ROI-E420

Grower's Choice ROI-E420 LED Grow Light

by Grower's Choice
Save $199.00 Save $199.00
$649.00
$649.00 - $725.00
$649.00
$450.00
$450.00 - $725.00
$450.00

🌿 Free shipping on $175+ orders in the USA

🌿 Ships to Canada, AK & HI. Call us for info

🌿 Price match guarantee, details here

Energy Rebates & Bulk Pricing Available

SAVE BIG on your grow setup! Email or call us at (973) 206-7590. For rebates eligibility, click here.

Cash Payment Discounts & Financing Options

Get an additional 3% off when you pay by ACH, Money, or Zelle. Select your option at check out.

We accept all major credit cards, crypto and Paypal 0% credit plans. More details here.

Full Manufacturer’s Warranty

You buy it, we back it! Your purchase is fully covered with a manufacturer’s warranty. More details here.

The Grower's Choice ROI-420 LED grow light is inspired by a collaboration between two of the most prominent and respected companies in the indoor grow lighting industry: TSL Horti Tech and Growers Choice.

Get to Know the Grower's Choice ROI-E420 LED Grow Light

The Growers Choice ROI-E420 is designed for growers who need power without bulk. Featuring a 3K full PAR spectrum, this compact yet high-output LED grow light delivers the perfect balance of efficiency and intensity for both veg and flower cycles. Its low-profile frame makes it ideal for grow tents, small grow rooms, and compact cultivation spaces, while its optimized 4' x 4' veg and 3.5' x 3.5' flower footprint ensures maximum canopy coverage.

Is the ROI-E420 Energy-Efficient?

Absolutely. With an efficiency rating of 2.5–2.7 µmol/J, this LED light outshines older HPS systems (1.3–2.1 µmol/J) while cutting electricity costs and reducing heat stress. If you want bigger yields without a bigger power bill, the ROI-E420 is the answer.

Features

  • Full-spectrum lighting with Grower’s Choice proven 3K full PAR spectrum for optimal plant growth.
  • Compact, low-profile frame designed for small grow spaces and cultivation tents.
  • Optimized coverage area with a 4ft x 4ft veg footprint and 3.5ft x 3.5ft flowering footprint.
  • Ideal for all growers from hobbyists to entry-level professionals seeking high yields.
  • Sleek, space-efficient design perfect for maximizing growth in limited spaces.

What's Included?

  • ROI-E420 LED System
  • 9’ Connecting Cable
  • 1ft NEMA 6-15P 240V M25 Plug
  • Information Page
  • 120/240 Adaptor
  • User Manual
  • Rope Ratchet

Download Resources

Spectrum

Specifications

Model Number: ROI-E420

Light Source: LED

Spectrum: GC-3K Full Phase

PPF: 1090 µmol/s

Input Power: 420W

Efficacy: 2.6 µmol/J

Fixture Dimension | Weight:

  • 35.3”L × 34.6”W × 3.2”H / 19.4 lbs
  • 89.6 cm × 88 cm × 8.1 cm / 8.8 kg

Mounting Height: 6" - 24", depending on application

Thermal Management: Passive

Max. Ambient Temperature: 104°F / 40°C

Dimming: 0-10V

Light Distribution: 120°

Lifetime: L90: >54,000 hrs

Power Factor: >90%

Certifications: UL 8800, UL 1598, IP65, DLC

Warranty: 5 Years Standard Warranty

Max Amperage by Voltage Service

  • 120V: 4.0A
  • 208V: 2.5A
  • 240V: 2.0A
  • 277V: 1.8A

Who Should Use This LED Grow Light?

  • Hobby growers and entry-level professionals looking for a compact, high-quality LED.
  • Small-space cultivators needing a low-profile yet powerful lighting solution.
  • Growers using tents or compact gardens with a 3.5ft x 3.5ft flowering footprint.
  • Veg and flower stage growers benefiting from a 3K full PAR spectrum.

Best Applications

  • Small-scale indoor grows where space is limited but yields need maximizing.
  • Cultivation tents needing a balanced spectrum for both veg and flower.
  • Professional growers looking for a secondary LED fixture for side lighting.
  • Energy-efficient setups optimizing 4ft x 4ft veg & 3.5ft x 3.5ft flowering coverage.

Why Shop with Grow Light Central?

“There’s a crapload of equipment providers out there. What makes Grow Light Central so special?”

“There’s a crapload of equipment providers out there. What makes Grow Light Central so special?”

Grow Light Central is a cannabis equipment solution provider connecting you to 100+ brands and 60+ suppliers trusted and used in the best cannabis facilies across the country.

With years of cannabis growing experience, Anthony, the owner and operator, personally ensures every order is handled right. No passing you off, no runaround, just the expert service and advice you deserve.

FAQs

How many watts do I need for my grow space?

The wattage depends on the size of your grow tent or room. A general guideline is 30-50 watts per square foot for high-light plants like cannabis. For example, a 2x2 ft area may need 100-200W, while a 4x4 ft area may require 400-600W for optimal coverage.

What is the difference between full-spectrum and red/blue LED grow lights?

Full-spectrum LED lights mimic natural sunlight, providing a balanced mix of blue (for vegetative growth) and red (for flowering and fruiting) light. Red/blue LED lights focus on specific wavelengths but may not support plants as effectively as full-spectrum lights.

Customer Reviews

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A
Anthony Shearer
This light slaps

The light is just as good of quality as the e720... the knob turns easier than the e720..... loving the light already