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HLG 300L Bspec

New improved longer design for more even light coverage. Our HLG 300L Bspec® indoor horticulture LED grow light is designed to replace a single-ended 600watt HID for Veg use only. Each HLG 300L Bspec® uses 2 of our custom designed full-spectrum high efficiency white light Quantum Boards® with Samsung LM301H and Blue 470nm. Learn more about the individual QB-288 boards here.



Top Features

  • New improved longer design for more even Light coverage
  • High efficiency white light Quantum Boards®
  • Full-spectrum White and 470nm Blue
  • Reliable passive-cooled design
  • Better canopy light penetration with diffused light
  • Inventronics EUM-240 Dimmable LED power supply included
  • 120V power Cord with Nema 5-15P Plug
  • 3 Year Warranty


Power 30-250 Watts
Voltage Range 90-277 VAC
Flowering Footprint Veg Use Only
Veg Footprint 4' x 4'
System Efficiency 158 Lm/W
System PPF Efficacy 2.5 μmol/joule
Total output 675 PPF
Dimensions 26" x 10" x 2.75"
Recommended Mounting Height 24-32 inches


Note that this lamp does not offer dim-to-off functionality. Dimming feature allows only dimming but cannot turn off the lamp completely.

Customer Reviews:


I use this light in a 4 x 4 for seedlings, clones, and veg. This light is amazing! My plants are healthy, strong, and vibrant. There's HLG and there's the competition. HLG all day!
Highly recommended

Seriously Amazing Light 300L Bspec

Was interested in getting a light that I could strictly use for Seedlings, Clones and Veg. This light does that and more. It has dimmer and is capable to veg 4x4. The blues standout and light is Bright. After purchasing I read reviews that this light ran hot. Trust me it’s warm but most definitely not hot when compared to cheaper lights. I love it. Most definitely happy with purchase


I have 2 of the HLG Diablo 650's in my flower room and I use 2 of these HLG 300L BSPEC boards over my 3' x 6' veg. The plants grow faster and more healthy than I caould ask for.

green growing

In my 3 by 3 HLG300 is growing the green. Leaves are growing great. Like the smaller setup on the 300 fits space just right.