HM RB-S 180 is a fanless LED grow lamp from Harvest Master’s Silent LED Series, designed for small footprint cultivation. It draws 180 W and is specified for an 80x80 cm target area, delivering up to 945 µmol/m²/s PPFD at 50 cm (670 µmol/m²/s at 70 cm). The fixture uses Edison diodes in a Dual Full Spectrum + 660 nm red mix, with Mean Well drivers, and is intended to run quietly without active cooling. Reported lifetime is 50,000 hours. The housing measures 47x31x11.5 cm and weighs 12 kg. Recommended hanging distances are 100 cm for seedlings/clones, 70 cm for vegetative growth, and 50 cm in bloom.
