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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
Close-up angled view of the GrowPros Model 4 8FT Under Canopy Grow Light showing the aluminum body, GrowPros Solutions branding, and power connector on one end.

GrowPros 8' Viper Under Canopy Grow Lights Model 4 - 300W Dual Channel 80% Red + White / Far Red (730nm)

by GrowPros
$375.00 - $400.00
$375.00
$375.00
$375.00 - $400.00
$375.00

See note on Interconnect Cables and Power Cords below.

Save up to $89 per light on rebates. Learn how.

🌿 Free shipping on U.S. orders $175+, unless noted above

🌿 Canada, AK & HI: Add'l shipping charges

🌿 Price match guarantee, details here

Energy Rebates & Bulk Pricing Available

SAVE BIG! Contact us for Bulk Pricing and Rebate Eligibility, or call us at (973) 206-7590.

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.

Hit every layer of your canopy with dual-channel red, white, and infrared lighting to grow bigger buds, speed up flowering, and reduce labor at harvest.

GrowPros Solutions’ first-ever under canopy light dual channel are engineered to enhance yield and color of lower flowers. These supplemental lights can significantly enlarge B-buds and C-buds, promoting better growth and development in areas that typically underperform. By targeting the understory, Growpros Solutions ensures a more uniform and abundant harvest, maximizing every plant's potential.

The GrowPros Solutions 300W 8' Under Canopy Grow Lights Model 4 Dual Channel have been meticulously designed by hydro growers for hydro growers. This innovative lighting system features two channels: one 250 Watt Red + White spectrum and the other 50-Watt far-red spectrum. Both channels are dimmable, allowing for precise control over light intensity to meet the specific needs of your plants at important growth stages.

ADJUSTABLE SPECTRUM

Slide the Bar to See How the Spectrum Changes

Channel 1: 80%Red + White



0W 250W

Channel 2: InfraRed (730nm)



0W 50W

Usage Guidelines

Under canopy lighting daisy-chain setup instructions showing safe power disconnection steps

Features

  • Compatible with 120V or 240V power cords (sold separately)
  • Optional accessories: stands, bench bridge stands, and interconnect cable (all sold separately)
  • Dual Channel Spectrum - Red + White / Far Red optimized for veg and flowering stages
  • Dimmable via RJ12 Data Cable, compatible with most major controllers
  • Enhances plant growth by improving light exposure to lower canopy areas
  • Built-in driver, compact slim profile, and low-heat operation
  • Boosts lower flower and fruit growth to match top canopy size and quality
  • Improves structure, density, and color for higher-quality harvests
  • Easy to maneuver during harvest, especially with bench bridge stands
  • Quick to install or remove between grow cycles
  • Power + data chaining via single connection - no extra components required
  • Do not mix or daisy-chain different models or lengths

What's Included?

  • GrowPros 8' Under Canopy Grow Lights Model 4 Dual Channel 300W

Download Resources

Maximum Power Electrical Data

AC Current: 120V - 2.54A | 208V - 1.46A | 220V - 1.37A | 240V - 1.25A | 277V - 1.07A

AC Power: 120V - 305W | 208V - 303W | 220V - 302W | 240V - 300W | 277V - 297W

Power Factor: 120V - 0.99 | 208V - 0.98 | 220V - 0.98 | 240V - 0.97 | 277V - 0.97

Daisy Chain: 6 pcs @120V | 7 pcs @208V | 8 pcs @220V | 8 pcs @240V | 9 pcs @277V

Interconnect Cables and Power Cords

Additional components can be ordered separately since quantities will depend on the total number of lights and selected configurations.

Note also that the lights connect together without interconnecting cables. The interconnecting cables are only needed to create the U where you have 2 rows of lights on a single bench OR if you need a space (up to 4 feet) between under canopy lights.

See the above chart for limitations on how many lights can be connected on 1 power cable.

Order your cords and cables below:

Specifications

SKU: GPS-UCL4-8FT-IR-120V

Wattage: 300W (Channel 1: 250W R/W | Channel 2: 50W IR)

Input Voltage: 120V-277V

Control: 0-10V Dimming

Data Connection: RJ-12

Power Factor: >0.9

Thermal Management: Passive

Working Temperature: 0°F to 104°F

IP Rating: Waterproof IP65

Lifetime: L90: >36,000 hrs

Warranty: 5 Years

Certifications: ETL

Heat Load Per Fixture: 1023 BTUs

Performance Data

PPE: 3.0 µmol/s

PPF: 900 µmol/s

Top View Dimensions

Length: 92.09 inches

Height: 2.76 inches

Width: 3.69 inches

Box Gross Weight: 61 lbs

Grow Light Central expert advice for indoor growing equipment

Who Should Use This Light?

  • Commercial Growers: Perfect for large-scale operations looking to increase yield, density, and uniformity across the canopy.
  • High-Density Indoor Growers: Essential for maximizing production in tightly spaced grows where lower buds struggle for light.
  • Hydro & Vertical Farmers: Designed for multi-tier and hydroponic systems where traditional overhead lighting leaves lower nodes underdeveloped.
  • Efficiency-Focused Growers: Reduces labor costs by minimizing defoliation and improving trimming efficiency.

Best Applications

  • Dense Canopy & SCROG Setups: Ensures lower buds develop into high-quality, marketable flower.
  • Flowering Stage Boost: Red + IR spectrum enhances resin production and speeds up flowering time.
  • Labor & Yield Optimization: Increases grams per cubic foot while reducing harvest time and sorting labor.

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 grow equipment solution provider connecting you to 100+ brands and 60+ suppliers trusted and used in the best grow facilities across the country.

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. 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.

Does GrowPros offer energy rebates for its products?

Yes! The potential savings from energy rebates are substantial, often covering approximately 50-75% of the overall project cost. To get a personalized estimate of your potential savings, simply contact us and we'll provide a complimentary assessment tailored to your project.

How much energy can I save with GrowPros' energy-efficient lights?

Upgrading to LEDs can cut your energy use by up to 75% compared to old-school incandescent bulbs and around 40% less than HID lights. That means lower electricity bills, especially if you're running multiple fixtures. Plus, LEDs last way longer, so you’ll save even more on replacements and energy costs over time.

Can GrowPros LED lights be customized for different bud strains?

Absolutely! We offer customizable spectrums and intensities to match the specific needs of different strains. Our tailored lighting solutions help optimize growth, potency, and terpene profiles.