Black Dog LED PhytoMAX-2 400 W LED Grow Light
Black Dog LED PhytoMAX-2 400 W LED Grow Light
Black Dog LED PhytoMAX-2 400 W LED Grow Light
Black Dog LED PhytoMAX-2 400 W LED Grow Light

Black Dog LED PhytoMAX-2 400 W LED Grow Light

  • Vendor
    Black Dog LED
    Sale price
    Regular price
    Sold out
    Unit price
    Shipping calculated at checkout.


    Shipping: Always Free


    PhytoMax-2 400 LED Grow Light
    • At 420 actual watts and 641 μMol/s total photon flux, the patent-pending PhytoMAX-2 400 LED grow lights are compact and powerful, outperforming 600W HPS bulbs. With PhytoMAX-2 we have delivered the most powerful and reliable, truly full-spectrum (365-750nm, UV to NIR) LED grow lights for indoor plants! The PhytoMAX-2 400 uses only the highest-quality, latest-technology, top-bin LEDs to deliver our proprietary full-cycle Phyto-Genesis Spectrum® evenly over the entire footprint, with unprecedented PAR levels, canopy penetration and yields!
    More efficient and powerful than any 600W HPS
    • PhytoMAX-2 400 LED grow lights for indoor plants better penetrate dense canopies to produce a superior yield with higher quality flowers and more trichomes
    • Increases yield over a 600W HPS while using 35% less electricity
    • LED grow lights save on electrical, cooling, reflector and bulb replacement costs
    168 High-Output 5-watt LEDs
    • Every top-bin LED is selected from the industry leader for the particular wavelength, including Cree, Osram, etc.
    • With glass lenses for durability and cleanability
    • High light intensity and energetic spectrum, crucial for canopy penetration to nourish lower leaves and flowers
    • Even, edge-to-edge coverage eliminates leaf burn and hot spots
    420 True Watts - 840 LED Watts
    Large Coverage Footprint
    • Up to 4.25' X 4.25' (18 square feet!) of flowering footprint coverage!
    • Proven by independent spectroradiometer testing
    Phyto-Genesis Spectrum®
    • The most efficient light spectrum for growing plants, based on over 6 years of research and testing, outperforming HPS, MH, CMH (LEC), induction, fluorescent, and "white", so-called "full-spectrum" LEDs in equal wattage tests
    • One ideal spectrum for both vegetative and flowering stages eliminates stalling associated with spectrum changes such as switching from MH to HPS
    • True full spectrum ranging from UVA to NIR (365-750nm) goes Beyond PAR™ for ultimate flowering and vegetative plant cycles
    • Appears white to human eyes, allowing easy determination of plant health
    • Targets not only photosynthetic (chlorophyll / carotenoid) peaks but also:
    1. Increases terpenes, flavonoids, antioxidants / vitamins and pigmentation with UV light
    2. Includes near infrared (NIR) light to boost photosynthetic efficiency through the Emerson Effect
    3. Decreases internodal spacing to direct more of your plants' energy to flowers and leaves, instead of stems
    Commercial Grade LED Grow Light Panels
    • ETL certified to UL safety standards
    • Unique no-glass design delivers up to 8% more light to your plants
    • The best active heat management in the industry, crucial to maximizing LED efficiency, life, and spectrum stability
    • Largest heat sink among commercial LED grow lights for superior cooling and increased LED life
    • Ultra quiet, long-life fans: 70,000+ hour rated lifespan
    Fast, Proven ROI
    • With a 6-12 month average return on investment, PhytoMAX-2 400 LED grow lights deliver higher yields with 35% less electricity than a 600W HPS
    Contains no Highly Toxic Mercury
    No hazardous waste disposal fees
    Metal adjustable ratcheting 8-foot light hangers
    5 Year Warranty



    • Flowering Footprint: 4.25' x 4.25'
    • Vegetative Footprint: 5.25' x 5.25'
    • Shipping Size: 24" x 24" x 12"
    • Product Dimensions: 75" x 15.75" x 5"
    • Weight: 24lb (10.9kg)
    • True Wattage: 420w
    • LED Wattage: 840w
    • Certifications: ETL, CE, FCC, RoHS
    • Mean Time Between Failure: > 50,000 hours
    • Number of LEDs: 168
    • Amp Draw: 5A~1.8A (@ 120/240v)
    • Cord Length: 8 feet
    • Voltage AC: 100V~250V
    • Work Frequency: 50~60 Hz
    • Power Factor: > 0.98
    • Operation Temperature Range: -4~104 °F
    • BTU: 1432
    • Fans Expected Life: 70,000 hours



    • 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.
        • 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 Black Dog LED's 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, we will refund you the difference.
      • Please visit our price match guarantee page to view the details of our price match policy.


    FREE pair of Black Dog LED heavy duty ratcheting grow light hangers are included with every PhytoMAX-2 400 light!

    Customer Reviews

    Based on 2 reviews
    Rosco Grows

    I purchased a Phytomax 400 about 4 years ago. I noticed that one of the light banks had stopped working during my last flowering period. I contacted Black Dog, and they made the repairs pain free! The entire process took less than two weeks and my light is back up and running again! This little light kills it every time Ive used it!

    T from TN

    I had done hours of research before l made the purchase. My Kind 600 is gathering dust in the corner. Lack of density, frost and depth of light penetration. Black dog lights DUMP par! So went on and purchased this 400....AND THEN ANOTHER! I no longer worry about light intensity. Did l mention lowers are as frosty and dense as tops!?!