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Black Dog PhytoMax-2 400 Watt LED Grow Light




The Black Dog Phytomax-2 400 LED provides an energy-efficient, full-spectrum lighting solution for commercial cultivators and professional home growers. Each Phytomax-2 400 LED fixture is capable of providing complete flowing-stage coverage for a 4.25′ X 4.25′ growing space (compare to 600w HPS) with 168 top-bin 5-watt chips, 420 input watts, and 641 µMol/s total photon flux. With the proprietary Phyto-Genesis Spectrum, Black Dog Phytomax-2 400 commercial LED grow lights are true full-spectrum LED’s that can be used for full-cycle plant growth. The Phytomax-2 400 LED fixture comes complete and ready to install with 8′ power cord and a pair of Black Dog ratcheting grow light hangers.


  • Complete commercial grade LED grow light can be used full-cycle, vegetative growth through flowering and finish.
  • Light Specs: Phyto-Genesis Spectrum®, 5.25′ – 4.25′ veg/flower footprint.
  • Power Specs: 420w, 3.5A @120v, 1.8A @240v

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Your Garden's Success is our #1 Priority

HTG Supply is committed to providing you with the very best products, pricing and service in the industry. We will ship your order fast and discreetly packaged to protect your privacy. Buy with confidence knowing your HTG Supply purchase includes simple returns as well as lifetime product support. Call our team of real growing experts with your purchasing or product use questions, and we will be here to help!

See it for less somewhere else? Give us a call and we’ll beat any online competitor’s price!

Customer Service:  1-866-710-GROW (4769) | | Hours: Mon-Fri 9:00 a.m. to 5:00 p.m.


Black Dog Phytomax-2 400 Watt 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 Black Dog Grow Light’s proprietary full-cycle Phyto-Genesis Spectrum® evenly over the entire footprint, with unprecedented PAR levels, canopy penetration, and yields!

All Black Dog LED’s ship FAST & FREE when you buy from HTG Supply!

Black Dog Phytomax-2 400 Physical Specs
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 27.0 lbs
Weight 24lb (10.9kg)
Certifications ETL, CE, FCC, RoHS
Mean Time Between Failure > 50,000 hours
Number of LEDs 168
BTU 1432
Fans Expected Life 70,000 hours
Cord Length 8 feet
Spectrum Phyto-Genesis Spectrum


Black Dog Phytomax-2 400 Power Specs
True Wattage 420w
LED Wattage 840w
Amp Draw 3.5A~1.8A (@ 120/240v)
Voltage AC 100V~250V
Work Frequency 50~60 Hz
Power Factor 0.98
Operation Temperature Range -4~104 °F
Weight 27 lbs


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