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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

GrowPros 4′ Under Canopy Grow Light 125W Model 1 - Full Spectrum + Far Red

Save $6.00 Save $6.00
Original price $125.00
Original price $125.00 - Original price $150.00
Original price $125.00
Current price $119.00
$119.00 - $144.00
Current price $119.00

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.

Boost lower canopy yields and potency with 4 ft under canopy lights engineered for uniform light distribution and optimized flower development.

Growpros Solutions’ under canopy light 4ft is engineered to enhance the yield and color of lower flowers. These supplemental lights effectively 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.

Maximize Flowering and THC Concentration

Under canopy lights are designed to illuminate beneath the dense plant canopies where traditional overhead lights struggle to reach. This strategic lighting approach not only boosts the yield but also enhances the quality of your crops by:

Increasing Flowering: These lights provide essential light to lower canopy areas, promoting more extensive flowering even in the shaded parts of the plant.

Enhancing THC Concentration: The added light spectrum encourages the development of THC and terpene compounds, improving the potency and profile of your harvest.

Spectrum Balancing for Optimal Growth

To achieve these benefits, it’s crucial to select the right spectrum based on your existing setup:

  • Model 1 Lights: Ideal for complementing HID top lights, which are rich in ROY (red, orange, yellow) spectrums.
  • Model 2 Lights: Best paired with full spectrum LED top lights to ensure comprehensive coverage.

This customization allows growers to balance light spectrums effectively, ensuring that every plant receives the optimal wavelengths necessary for peak growth and quality. By integrating these advanced lighting solutions, you can achieve increased yields and superior product quality, setting your harvest apart in appearance and chemical composition.

DIMMABLE SPECTRUM

 

Slide the Bar to See How the Spectrum Changes



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Usage Guidelines

Illustration showing correct and incorrect methods for daisy-chaining under-canopy LED grow lights

Features

  • Compatible with 120V or 240V power cords (sold separately)
  • DLC Listed: Eligible for utility rebate programs (contact us for details)
  • 120-degree lens angle for wide, even light distribution
  • Built-in driver with slim, lightweight design
  • Deep + far red spectrum optimized for veg and flower stages
  • Boosts lower bud growth up to 40% for denser, more colorful harvests
  • Enhances B-bud structure, density, and overall quality
  • Compact, durable construction that’s easy to move and uninstall between runs
  • Single connection for both power and data

What's Included?

  • GrowPros 4' Under Canopy Grow Lights Model 1

Download Resources

Maximum Power Electrical Data

AC Current: 120V - 1.04A | 208V - 0.60A | 240V - 0.52A | 277V - 0.45A

AC Power: 120V - 131.5W | 208V - 126.4W | 240V - 126.1W | 277V - 126.1W

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

Daisy Chain: 8 pcs @120V | 13 pcs @208V | 15 pcs @240V | 18 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-UCL1-4FT-120V

Wattage: 125W

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, FCC, DLC

Heat Load Per Fixture: 426.25 BTUs

Performance Data

PPE: Up to 2.8 µmol/s

PPF: 350 µmol/s

Dimensions

Side View Length: 48 inches

Effective Length: 47.5 inches

Width: 2.89 inches

Height: 3.19 inches

Grow Light Central expert advice for indoor growing equipment

Who Should Use This Light?

  • Commercial Growers: Ideal for large-scale Bud cultivation where maximizing lower bud development is key.
  • Hobbyists & Small-Scale Growers: Perfect for those looking to enhance yields without overhauling their entire lighting system.
  • HID Growers: Best for growers using HID top lights, as the spectrum complements traditional ROY-heavy lighting.
  • Resin-Focused Cultivators: Designed for those aiming to increase THC concentration and terpene production.

Best Applications

  • Dense Canopy Setups: Provides critical light penetration to shaded areas, reducing larfy buds.
  • THC & Terpene Boosting: Enhances cannabinoid production by optimizing light exposure to lower flowers.
  • Hydroponic & Vertical Farms: Supports multi-tier systems where overhead lights struggle to reach lower nodes.

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.

Why should I choose GrowPros Solutions for my bud grow operation?

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.