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Optic GMax 300 Dimmable LED Grow Light

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Original price $549.00
Original price $549.00 - Original price $549.00
Original price $549.00
Current price $436.00
$436.00 - $436.00
Current price $436.00

Contact Us For Volume Pricing.


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GMax 300 delivers the most advanced Green House LED Grow Light Experience on the Planet. 1 Touch Screen gives you full control over multiple GMAX Lights so you can fine tune your lighting system with the Programmable Dimmers, Spectrum Control & Auto Sunrise. Your Gmax 300 Lighting System is fully versatile to grow any type of plants or Crops at any stage in their life cycles and do it at the highest level of performance possible between the Programmable Dimmers so you can set any level light intensity for any point during the day & Spectrum Controls.

GMax 300 is Equipped with the Latest in Horticulture LED Technology from Samsung with their new V2 LH351H Deep Red LEDs (3.75 umols/J) which weren't expected to hit the mainstream until 2022, LH351H Royal Blue LEDs and the LM301H full spectrum White light LEDs. GMax 300 sets the new standard for greenhouse style LED Grow Lights with Double Dimmer Spectrum Control and Controller Ports so you can control all of your lights together from 1 touchscreen and showcase the Auto Sunrise in your grow space.

NEW! Samsung LH351H v2 660nm Deep Red LEDs- 3.75 umols/J

253-881-1355 or inquire at

Coverage Footprint:


1 Unit

3' x 3' area (.9m x .9m)

2' x 4' area (.6m x 1.2m)

2 Units

4' x 4' area (1.2m x 1.2m)

Hanging Height :

Flower: 10"-24"

Pro Tips: Wk1-3 @20"-30" - Wk4-6 @18"-24" - Wk7-10 @12"-15"

Veg: 24" - 30" (@ 50% Power)

Seedling: 24" (Dimmed Down @ 35%)

Dimmers : 2

Dimmability: 0% - 100%

Dimmer#1 - Deep RED, UV, IR & Warm White LEDs

Dimmer#2 - Royal Blue & Cool White LEDs

Gmax 300 Components:

LEDs: 780 Total

White LEDs:

- 744 Samsung LM301H Horticulture series 3500k

Bloom Enhancers:

- 24 Samsung LH351H V2 660nm Deep Red LEDs -

- 8 Samsung LH351H 450nm Royal Blues LEDs -

- 2 IR and 2 UV LEDs

Optics :

Samsung LM301H White LEDs: 120 Degree Primary Lens

LH351H V2 660nm Deep Reds: 120 Degree Wide Beam Primary Lens

LH351H 450nm Royal Blues: 120 Degree Wide Beam Primary Lens

Driver: Meanwell HBG Series Driver

(Built into a Optic Vented Driver Case with Dimmers & Controller Ports)

Thermal management: Passively Cooled


Full Spectrum White Light 3500k (Mixed White Light LEDs) (Full Power on 2 dimmers)

+ 660nm Deep RED + 450nm Royal Blue + ultraviolet + Infrared

PPFD Slim GMax 300:

(Tested with Apogee MQ-500 meter in 3x3 / .9m x .9m Tent)

10" Hanging Height PPFD: 1,085

18" Hanging Height PPFD:

Vertical PAR OutPut:



Gmax300 in 2x4 tent

Optic GMax 300 Specs

HID/HPS Equivalent 600w HPS
Kelvin 3500K DayLight White
IP Rating IP65 Waterproof - Green House Rated
PAR Efficacy 3.0 umols/j
PPF 2,903 umols
Master Controller Compatible with Touch Screen Master Controller (2 ports)
Actual Power Draw 300 Watts
LEDs per Watt 2.6
Amps 3 Amps at 120v (1.5Amp @240v)
Lifetime 100,000 Hours+
Warranty 10 Years full warranty - Lifetime warranty on Meanwell Driver
Release Date August 2021
Light Fixtures GMAX 300
Cables 6 Foot power cord, rope ratchets and cables included
Plug USA, CANADA, EURO, Commercial, Industrial, etc. (We automatically ship the correct cord for your country)
Dimming 0-100% Dimming Capabilities (Dimmer Included) (Works with external touchscreen Master Controller)
Dimensions 22" x 4.5" x 6"
Fixture Weight 12 lbs
Shipping Weight 14 lbs
Grams Per Watt up to 2.8
Yield Up to 840 grams / 30 oz / 1.87lbs
Hanger Comes with adjustable rope ratchets
Shipping Weight 40 lbs
Recommended for Closet Grow, Cabinet Grow & Grow Tents. & Green Houses

- Free Shipping on all orders $175+ in the continental US (some exclusions apply).
- In most cases tracking info will be provided via email within 24 hours of shipment.
- Easy Returns within 30 days of purchase + 25% restocking fee.
- Please see our Shipping & Returns policy for more details.

Warranty Information
Optic LED purchases include a 5 year warranty for lights purchased between the years of 2015 - 2018 and a 10 year warranty for lights purchased between the years of 2019 - present.