Horticulture Lighting Group- HLG 350R 350W LED Grow Light
Horticulture Lighting Group- HLG 350R 350W LED Grow Light
Horticulture Lighting Group- HLG 350R 350W LED Grow Light
Horticulture Lighting Group- HLG 350R 350W LED Grow Light

Horticulture Lighting Group- HLG 350R 350W LED Grow Light

  • Vendor
    Horticulture Lighting Group
    Sale price
    Regular price
    $648.00 You save 15%
    Unit price
    Shipping calculated at checkout.


    Shipping: Always Free


    HLG 350R 350W LED Grow Light

    The HLG 350R commercial indoor LED grow light is designed to replace a single-ended 600W HID fixture.

    Each HLG 350R is equipped with two custom designed full-spectrum, high efficiency, Diablo quantum boards with Samsung LM301H and LM351H Deep Red.

    The 350R is rectangular in shape, meaning it is a great option for flowering in smaller grow spaces as well as vegging in commercial grow areas.

    • 35” wide design for even light coverage!
    • Powered with high efficiency Diablo Quantum Boards for 2.75 PPF/W
    • 911 PPF high output to replace even 600W HPS
    • Quantum Board : QB 648 made by Samsung
    • Full-Spectrum White and 660nm Red
    • Reliable passive-cooled design
    • Better canopy light penetration with diffused light!
    • 60-330W dimmable design
    • Made In USA!
    • 3 Year Warranty!



    PPFD Measurement Result at 15" in Height- 6 inch Square Grid

    PPFD Measurement Result at 24" in Height- 6 inch Square Grid







    2.75 umol/j

    Voltage Range:

    100VAC-277VAC: 50/60Hz


    Samsung LM301H & Deep Red 660nm

    Flowering Footprint:


    Flowering Height:


    Veg Footprint:


    Veg Height:


    Thermal Management:

    Passive-Cooled Design




    UL 8800, UL 1598, CSA


    3 Years



    Are LED Grow Lights Cheaper to Run than HPS?

    In Short, YES!

    On average, LED Grow Lights use about 25-50% the energy that HPS Grow lights do. In the long run, LED Grow lights end up saving you money.

    LED grow lights also last more than twice as long as HPS lights.

    Are LED Grow Lights worth it?


    LED Grow lights beat out traditional HPS lights in almost every metric.

    Check out our article on 5 Reasons to Consider LED Grow Lights in Your Grow Tent.

    What Size Grow Tent Should I Use For the HLG 350R?

    We would recommend you use a 4’x2’ tent, considering this light has a flowering footprint of at least 5’x3’, a 4’x2’ tent would maximize your plant count and grow light potential!

    Below are some options available. Use code tent10 for an extra $10.00 off you grow tent!

    4’x2’ Grow Tents

    Mars Hydro: 4'x2'x5'8" Grow Tent- $125.99

    Goliath Grow Tent 2'x4'x6'11"- $250.00

    Original Gorilla Grow Tent 2’x4’x6’11”- $271.95

    What power of HPS light can the HLG 350R Replace?

    Due to it’s 1011+ high PPF output, the HLG 350R has the ability to replace a 600W HPS grow fixture!

    Shipping and Refunds

    At Grow Tent Harvest we strive to create the best shopping experience possible for our valued customers.

    • On all orders equal to or totaling over $50.00, Grow Tent Harvest offers free-shipping in the United States (excluding Alaska, Hawaii and Puerto Rico).
    • Orders must be shipped to a physical address, eg no P.O. Boxes
      • All orders placed with Grow Tent Harvest will be processed Monday-Friday, 6 am- 4 pm (PST).
        • Any orders placed on holidays, after hours or over weekends will be processed on the next business day.

    Cancellations & Refunds:

    • Please review our warranties, refunds, returns and cancellations page to see Horticulture Lighting Group’s (HLG) cancellation and refund policies.

    Price Match Guarantee

    • We pride ourselves on our diligent work to make sure we are bringing our customers the lowest price on the internet, period.
      • If you find a lower price on any other site on the internet and submit a claim to us at info@growtentharvest.com, we will refund you the difference.
      • Please visit our price match guarantee page to view the details of our price match policy.



    Customer Reviews

    Based on 14 reviews

    Exceptional high quality.

    Hlg 350R

    Hung my new 350R yesterday and really like the fact that my dimmer knob has 10 notches equal to approximate 10% per notch and light can dimmed all the way to off if desired. Will definitely be enough light to rock out a 3x3. Curious as to why I received a paper with it warning about UV exposure though. I didn't think this light covered the UV spectrum. Maybe it was more about the intense brightness. As always with HLG build quality is exceptional. Would have liked to the 350R in big red letters on it like the 650s.

    super nova

    Light is a supernova bright as H---. Had it setup out of the box and up within five minutes.

    HLG for the win

    The lights speak for themselves but their customer service is amazing

    Richard Jones

    My plants absolutely love this light. As do I once I have more room for more hlg lights I will be buying them. Totally amazing.