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Product image 1Black Dog Phytomax-2 400 Watt Full Spectrum LED Grow Lights
Product image 2Black Dog Phytomax-2 400 Watt Full Spectrum LED Grow Lights
Product image 3Black Dog Phytomax-2 400 Watt Full Spectrum LED Grow Lights
Product image 4Black Dog Phytomax-2 400 Watt Full Spectrum LED Grow Lights

Black Dog Phytomax-2 400 Watt Full Spectrum LED Grow Lights

Regular price $1,099.00

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!

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

Free Shipping On All Black Dog LED Grow Lights

  • 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:
      • Increases THC, CBD, terpenes, flavonoids, antioxidants / vitamins and pigmentation with UV light
      • Includes near infrared (NIR) light to boost photosynthetic efficiency through the Emerson Effect
      • 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
    • Unlike all HID (HPS, MH, CMH / LEC) and fluorescent / induction bulbs
    • No hazardous waste disposal fees
  • Metal adjustable ratcheting 8-foot light hangers
  • Industry-Leading 5 Year Warranty

Once you use PhytoMAX-2 LED grow lights for indoor plants, you'll understand why people say HID is a thing of the past!

PhytoMAX-2 400

Max. Vegetative Footprint
5.25 x 5.25 feet (250 cm)
Max. Flowering Footprint
4.25 x 4.25 feet (200 cm)
Max Hanging Height
PhytoMAX-2 400
30in. (121cm)
38 in. (150 cm)
Hanging height above average top of plant canopy to achieve the maximum recommended footprint size.
Max. Recommended Vegetative
5.25' x 5.25', PPFD 215,   Height 38"
Max. Recommended Flower
4.25' x 4.25', PPFD 329,  Height 30"
Medium Recommended Flower**
3' x 3', PPFD 660, Height 21"
Smallest Recommended Flower**
2.5' x 2.5', PPFD 951, Height 18"

* Average PPFD measurements are over the entire footprint, edge-to-edge and corner-to-corner, based on reflective surroundings or adjacent lights.
** When growing in an area smaller than the Medium Recommended Flower Footprint, CO2 supplementation is generally required to make full use of the additional light.


  • Max. Flowering Footprint - 4.25' x 4.25'
  • Max. Vegetative Footprint - 5.25' x 5.25'
  • Shipping Size - 24" x 24" x 12"
  • Product Dimensions - 15.75" x 15.75" x 5"
  • Shipping Weight (lb.) - 27.0000
  • Weight - 24lb (24kg)
  • True Wattage - 420w
  • LED Wattage - 840w
  • Certifications - ETL, CE, FCC, RoHS
  • Mean Time Between Failure - > 50,000 hours
  • Number of LEDs - 168
  • Amp Draw - 3.5A~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

We typically ship orders out within 1-3 business days. We ship most packages via Fedex, UPS, and USPS and tracking will be emailed once your order has been shipped. We ship orders weekdays, Monday through Friday from our Oklahoma City, Oklahoma warehouse. You can contact us with any shipping related questions Contact US

You can return items within 30 days of invoice date to get a full refund, assuming the item is in 'as new' condition, and unopened  To read our full refund and returns policies go to our Refunds & Returns page.

 We do not accept returns of any opened products.



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