Grow 300 LED

Grow Light Science’s GROW 300 LED is a full‑cycle fixture built for 2x4 ft flowering or 3x5 ft veg canopies. The updated model draws 321 W, delivering 884 µmol/s total PPF (813 µmol/s usable) at about 2.75 µmol/J. It uses 1,056 top‑bin diodes: Samsung LM301B whites paired with OSRAM OSLON Square Hyper Red 660 nm Gen 3, tuned to the brand’s HI‑RED spectrum. The slim 46.1 x 12.6 in form factor includes onboard 0–10 V dimming and high CRI (90). Typical arraying is one unit per 2x4; two units will flower up to a 5x5 according to GLS testing at 20 in hang height. Fixture dimensions are 117 x 32 x 7.4 cm and weight is about 6.4 kg; lifetime is rated L90 > 50,000 hours.