The HLG 300L Bspec by Horticulture Lighting Group (HLG) is a high-performance Quantum Board-style LED fixture tailored specifically for vegetative growth in indoor horticulture. Featuring two large panels populated with Samsung LM301H diodes and an added boost of 470 nm blue LEDs, its full-spectrum output is optimized for vigorous, stocky vegetative development. Drawing between 30 and 250 W from a universal 90-277 VAC supply, the 300L Bspec achieves an impressive efficacy of around 158 lm/W, delivering approximately 675 PPF at an estimated 2.5 μmol/J efficiency. With a recommended veg footprint of 4'×4' (roughly 120×120 cm) and optimal hanging height of 60-80 cm above the canopy, it’s ideal for intermediate grow spaces. But if you’re thinking about another more powerful or a different lighting system, then check out the HLG 650R or even the HLG Scorpion Diablo V2.
