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Slim 320S Dimmable LED Grow Lights 3500k - Spectrum Control - LH351H v2 (UV)

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Original price $799.00
Current price $549.00


                      USA & Canada Orders: 2-5 Day Delivery

                      Europe & UK Orders: 3-7 Day Delivery

                       Outside USA Orders: 3-7 Day Delivery



          Slim 320S is by far the most advanced LED Grow Light ever manufactured for a 2' x 4' Grow Space. Loaded with all your favorite grow tech and features LED Grow Light company has in the market today including the new Samsung LH351H Deep RED LEDs rated at 3.1 umols/J And the new Samsung LH351H Royal Blues, Paired with the Samsung White LM301H LEDs which are above 3.0 umols/J with a 2way dimmable system running 1,388 LEDs total for next-generation efficiency and tuning capabilities.  Slim 320S when combined with our touch screen master controller gives growers the power to recreate mother nature with precision accuracy.

          Slim 320S has all the best components in the industry but is also designed to last twice as long as all other grow lights today. Dimmers come standard with Slim series lights as well as the industry's most overbuilt cooling system & top quality, long-lasting Meanwell Drivers. Optic LED was the first mainstream LED Grow Light company to begin using LM301H and now we are the first to publicly disclose our collaboration with Samsung and using their newest record-setting technology with full transparency from their Horticulture Specific Line of LEDs.

NEW! Samsung LH351H v2 - 3.75 umols/J

253-881-1355 or inquire at

- For Commercial Quantities email us for special pricing. 




Coverage Footprint:

Flower:                                           Veg:           

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

Max: 3' x 5' area (.9m x 1.5m)   


Hanging Height & Dimmer Settings :  

Seedling: 48"+    / 25% Power
Vegetative: 48" + / 50% Power (or 24" @ 25% Power)


Wk1-3 - @24-30""     / 50% Power
Wk4-6 @18" - 24"  / 75% Power
Wk7-8 @18" - 24"  / 100% Power
Wk9-10 @12" - 18" / 100% Power
Pro Tips: It's always best to set the light up higher and let the plants grow up into the light.


Slim 320S Components:

LEDs: 1,388 Total LEDs 

Samsung LM301H 1,344 pcs

- Top Bin Samsung LM301H LEDs  3000k & 3500k Mixed

Bloom Enhancers:

Red LEDs: 24 pcs

- New! Samsung LH351H V2 660nm Deep RED LEDs 3.75 umols/j

- New! Samsung LH351H 450nm Royal Blue - 2.8 umols                


Ultra Violet LEDs: 4 pcs (Faint Dim Purple LED)

- LG UV LED - Proven Increased Resin Production and Potency of oils


Optics: 120 Degree Primary Lens on all LEDs

Drivers: Meanwell Dimmable Driver 0%-100% (Industry Best)

Dimmers: 2 Independent Dimmers


Dimmer#1 ( Blue and White LEDs Channel)


Dimmer#2 ( RED and White Channel) 


Controller Tech: Fully Compatible - (*Touch Screen Controller is Sold Separately)

2 Way Dimmability - You can Control the 2 Dimmers Independently

Spectrum Control - 2 Way Spectrum Control, add more Blue and White or Red and white light independently or programmed in the timer mode.

Dual Port RJ-11 Controller hookup  - Daisy chain up to 20 lights

Thermal management: Passive Cooling from a significantly Overbuilt extruded Heat sink (Fanless Technology - No Moving Parts) 

*Coolest Operating Temp of any High Power Bar Fixture on the market.


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

+ 660nm Deep RED 450nm Royal Blue + ultraviolet

 (Powerful Spectrum Control leads to healthier plants with lower stress level leading to higher overall production, yield, and flower quality)



Test in 2' x 4' Area: .6m x 1.2m = .72 Square Meters

PPFD Slim 320S:

(Tested with Apogee MQ-500 meter in 2x4 / .6m x 1.2m Tent @ 320w)  

6" Hanging Height PPfd: 1,389

8" Hanging Height PPfd: 1,228   

Slim 320S Specifications:

Total LEDs : 1,388

Grams Per Watt: up to 2.8

Yield: Up to 896 grams / 32 / up to 2.0  lbs

HID/HPS equivalency: 750 watts HPS 

Kelvin: 3500K Day Light White 

IP Rating: IP65 Waterproof

LEDs Per Watt:  4.33 Collectively 

PPFD @6": 1,389

ppf/w :  3.1 umols/J

Actual Max Power Draw: 320 watts max

Amps:  2.8 Amps at 120v ( 1.4 Amps @ 240v)

Voltage : Internationally Used 110 volts - 277volts (240v cord sold separately)

Lifetime: 100,000 Hours+  

Warranty: 10 Years full warranty (Industry Best)

Release Date: Dec 2020

Shipping: Free Shipping to 60+ countries 

Light Fixture: 42" x 21" Vertical Farming Aluminum BAR Fixture

Cables: 6 Foot attached power cord 

Plug: USA, CANADA, EURO, Commercial, etc. (240v sold separately)

(We automatically ship the correct cord for your country)

Dimming: 2 Dimmer Knobs 20%-100%. 2-Way Spectrum Control 

Spectrum Control: 2 Dimmer Knobs 20%-100%. 2-Way Spectrum Control 

TouchScreen Master Controller: 2 ports, Fully Compatible. 2 Dimmer control 0%-100%

Fixture Dimensions: 42" x 21" x 4.5" 

Fixture Weight: 18 lbs (Aluminum Fixture + Driver Case)

Shipping Weight: 28 lbs

Hanger: Comes with 4 adjustable rope ratchet hangers.

Recommended for: Grow Tents, Grow Rooms, Greenhouses & Indoor Cultivations. 

*International Shipments may require Taxes & Duties. Contact us for a quote! - 

Slim 320S Patent Pending.


253-881-1355 or inquire at

 *Compatible with the Optic LED Master Controller ($149.00)


Also, check out our Instagram page for more videos @OpticLEDGrowLights


Slim 320S Videos Page. Click Here!!!


Unboxing & Review - Dr. Autoflower

Pictures: Slim 320S

Optic LED Michigan Showroom.

Double Row LED Strip Boards with Optic Slim Tech (LM301H & LH351H Reds)



#1 Samsung Electronics Expands Horticulture LED Lineups to Advance Greenhouse and Vertical Farming. -Click Here

#2 Samsung Sets a new Photon Efficacy record in White LED Packages for Indoor farms.  LM301H . -click here to read the article. 


Click Here to See More Details on Samsung Horticulture LEDs.