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Regular price $299.40 USD
Regular price $499.00 USD Sale price $299.40 USD
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**BRAND NEW - Sold As Is - No Warranty**

The GrowMax is a 320W, constant-current, programmable LED driver that operates from 110 - 277 VAC input with an excellent power factor. Created for many lighting applications including high bay, high mast, it provides a dim-to-off mode with low standby power. The high efficiency of these drivers and compact metal case enables them to run cooler, significantly improving reliability and extending product life. To ensure trouble-free operation, protection is provided against input surge, output over voltage, short circuit, and over temperature.

Footprint: Designed to fit into a 2x4 to 4x4 tent.

GrowMax Light Spectrum Chart

The color temperature of this spectrum is midway between those of the sun and tungsten filament light, which gives it “the best of both worlds”. It can be used for the entire grow cycle whenever it’s difficult to provide separate spectra for veg and flower, for example with autoflower plants.


  • 4000K - Full Spectrum White Light

  • Perfect size/wattage for tents and small areas

  • Utilizes 3 highly efficient GroBar X LED channels

  • Using industry leading horticultural LEDs from Samsung

  • Ideal replacement for CMH or fluorescent

  • Optimum uniformity and PPFD

  • Low profile (1.5” in height), lightweight aluminum fixture

  • Bright, cool and touchable (acrylic lens), allows plants to be inches away from light

  • MAXimize yield with the best light intensity and uniform PPFD

  • Highly efficient, passively cooled LED UL recognized luminaires

  • Energy efficient - decreases operating costs

  • Long-life LED modules - never change a bulb again

  • Designed and Assembled in the USA

  • Limited 5 year warranty on luminaires, 7 years on LED driver

  • Empower growers to use the highest standard technology at an affordable price




Nominal Power


PAR Efficacy

Up to 2.6 μmol/J


22” X 47.5” X 1.5”


Fixture: 14.25 lb / Power Supply: 5 lb

Beam Angle

120 Degree

Input Voltage

110 - 277VAC

IP Rating**


Warranty Fixture

5 Year Limited

Power Supply AC Voltage Input

110 - 277VAC



GroBar X LED Channels


Warranty Power System

7 Year Limited

WiFi Dimming/ Scheduling

Multiple Automated / Programmable Options Available

Manual Dimming


Efficacy is tested at a board level and will vary based on power choice and protective optics, if applicable.

Efficacy increases at lower wattages.

*GroBar X individual luminaires are cULus and RoHS

**Self Verified


Developed and manufactured in the US by Lighting Science Group