The Grow Light Science PROGROW 640 is a full‑cycle, bar‑style LED fixture designed for close‑proximity indoor cultivation. It draws about 651 W and outputs 1,756 µmol/s (≈2.7 µmol/J), delivering high PPFD for use with or without CO2. Coverage is specified at 4x4 ft for flowering and up to 5x5 ft for vegetative growth. The HI‑RED spectrum targets full‑cycle cannabis needs, and build features include a built‑in dimmer, 0–10 V control, and dual RJ12 ports for external controllers. The fixture measures 47.2 x 42.8 x 3.2 in and weighs roughly 12.5 kg. Listed certifications include ETL to UL 1598 and UL 8800. Rated life is Q90 > 36,000 hours. High CRI (93) components and top‑bin Samsung/Ledestar diodes are noted by retailers.
