GrowBright EC-4000 440W LED Grow Light



The largest LED grow light in the Growbright EC Series, at 440 watts the EC-4000 is incredibly efficient, reliable, and flexible all for an amazing value! This large fixture features an array of high-quality SMD LED chips that are optimized for full-term growing from seedlings to blooming plants. The EC-4000 also features onboard dimming allowing users to regulate light output based on different plants and growth phases. Comes ready to use with a simple plug-and-play installation. Mount the LED grow light in any grow setup using the included wire hanging harness and rope ratchet hangers.

  • Includes – fixture with built-in dimming, wire hanging harness, pair of rope ratchet hangers
  • Chip Array – 3000K, 5000K, 660nm, 750nm
  • Power draw – 440W/3.88A @ AC 120V
  • Footprints – 5’x5’ Propagation, 4’x4’ Advanced Veg - Flower

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GrowBright EC-4000 Full-Spectrum SMD LED Fixture

Get the latest in plant-growing LED technology at an incredible value, and grow your own amazing plants indoors with the GrowBright EC-4000 Full-Spectrum LED grow light. Equipped with high-efficiency SMD chips and onboard dimming, GrowBright EC series lights provide the growing power and control needed to produce excellent results. Simplify your garden’s lighting needs with the efficiency, reliability, and flexibility of the GrowBright EC-4000 LED. This fixture comes ready to plug & play with included wire harness and adjustable ratchet hanger to fit in any setup, system, or grow room!

GrowBright EC-4000 Advantages:

  • High-quality SMD chips
  • Growth Boosting Full Spectrum
  • High PPFD w/ Uniform Light Distribution
  • Built-in dimming controls from 0-100%
  • Multi-volt capability – operates on 120v-277v power
  • Uses only 440 watts!

Standard Dimming Control – Output Adjustment

Easily control plant lighting requirements for different plant types or plant growth phases. Simple one-touch dimming allows you to turn it down for seedlings or small plants and ramp it up for maximum growth. Regulate your light output as needed, saving electricity and giving you complete control of your lighting throughout the plant growth cycle.

Plug & Play Installation

Your GrowBright EC-4000 LED comes ready to use out of the box with complete instructions and growing tips. FREE rope ratchet hangers are included to allow you to adjust to the perfect height for your plants. Use the optional dimming control with a remote cable to adjust output if desired. You’ll be set up and growing in just a few seconds. Happy growing – GrowBright USA!

Specs & Features:

  • Measures – 22.8” Long x 23.6” Wide x 2.6” High
  • Includes – fixture with built-in dimming, wire hanging harness, adjustable rope ratchet hanger
  • Chip Type – SMD
  • Chip Array – 3000K, 5000K, 660nm, 750nm
  • Power draw – 440W/3.88A @ AC 120V
  • Frequency – 50-60HZ
  • Footprints – 5’x5’ Veg, 4’x4’ Flower
  • Built-in dimming for output control
  • Plug & play installation
  • Conformal coated PCB
  • 2-year warranty


Weight 13.90 lbs
Dimensions 26 × 26 × 5.25 in

Spectrum Type

Product Category

Grow Lights

Chip Type



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