GrowPros HM660 LED Grow Light


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HM660 Series

A full-spectrum LED rack lighting solution designed for commercial indoor and greenhouse applications, enabling control over the plant cycle from the vegetative stage to the flowering stage. Indoor plants grow best under full-spectrum lights, which replicate the natural spectrum of the sun. The HM660 Series, with an increased lifespan over traditional grow light sources, cultivates healthier, happier plants.

Performance Data

The HM660 Series produces 1.8 gram per watts (dried) of crop yield. A high-PPFD and PAR indicates high efficacy, or light output produced per expenditure of unit of power. Generating about 50% more in energy savings over traditional HID and HPS light sources, the HM660 gives you meaningful savings over time. Will not produce the same results without CO2 supplementation. cULus Listed; Dry and Damp Location Rated; 7-Year Warranty.

The HM660 Advantage

Better control of environmental and production factors means higher yield and multiple harvests in one growing season. No wasted energy: Almost 100% of power expended converts into growth-targeted light energy. The HM660 lighting system is a complete, pre-assembled LED grow light that lowers installation time with a wide range of wiring techniques and connectors. The HM660 Series system runs cool thanks to a passive cooling thermal management system, meaning your lighting systems last longer while retaining high light output levels. Longer lifespan means you can grow crops for many years without needing to replace the lighting system, reducing costs.


Features & Benefits

  • Compatible with TrolMaster system+Adapter LMA-14
  • Added one extension bar on each side to cover 3’ x 6’ or 4’ x 6’ grow tray
  • Total of 3500 pcs LED diodes on the fixture including deep red led diode
  • Come with 120-277V AC output quick access outlet on the fixture
  • Foldable design, easy installation
  • Up to 30% more energy saving than traditional HID and HPS
  • Optimized spectrum proven by growers for veg and flowering
  • Superior delivered PPF and PAR exceeding 1000W HPS
  • Scientifically engineered to maximize photosynthesis, growth, and yield

DIMMER: The HM660 comes with an integral dimmer that you can adjust to 25, 50, 75, 100, and 110 percent for an extra boost of power.

CONTROL SYSTEM: Works with TrolMaster Hydro control systems. You will need to use a lighting control adapter F(LMA-14). When you put the dimmer in EXT mode, it is ready to connect to the control system (If you daisy chain these lights and use a control system to control them together, you need to switch it to EXT mode).

EXTENDABLE BARS: The HM660 has removable end caps in order to attach additional bars to each end. Each extended bar has a 150W individual driver and the PPF is 344 umol/s. It is ideal for hanging on top of a 3’ x 6’ or 4’ x 6’ grow tray



  • Vegetative stage is 75% power at about 24”-48” high



  • 1-2 week is 75% power at 24” high
  • 3-6 week is 75% power at 18” high
  • 7-8 week is 100% power at 12” high
  • 9-10 week is 110% power at 12” high





PERFORMANCE DATA 660W (100%) @ 12″H 720W (110%) @ 12″H
PPF 1716 μmol/s 1820 μmol/s
PPFD 1188 μmol/m2/s 1275 μmol/m2/s
PPE 2.6 μmol/J 2.6 μmol/J



What’s In The Box

  • 1x network cable for daisy chain
  • 1x 120-240V plug adapter
  • 2x steel wire sling
  • 2x 1/8 lifting pulley hoist rope hook
  • 4x thumb screw


Additional Info

Spec Sheet 




Wattage660W (Boost up to 720W)
Heat Load: 2148 BTU
Input Power: 120V-277V
  • 120V: 5.96A @ 713W
  • 208V: 3.50A @ 700W
  • 240V: 2.95A @ 695W
  • 277V: 2.71A @ 685W

Coverage Area:

  • Flower: 4’ x 4’ Area, Max 5′ x 5′
  • Veg: 4’ x 4’ Area, Max 5′ x 5′
Frequency: 50/60Hz
Control: 0-10V dimming (0-100%), Wireless
Power Factor: 0.9
THD: 20%
Thermal Management: Passive
Working Temp: -40ºF ~ 122ºF
IP Rating: IP44, Suitable for dry & damp locations
Dimensions: 46.85″ x 42.8″ x 3″
Weight: 30 lbs
Warranty: 7-year limited


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