SK603

Spectrum King’s SK603 is a full‑spectrum LED grow light designed as a 1:1 replacement for 1000 W DE HPS/MH fixtures. The official product sheet lists power consumption at 641 W, with a measured PPF of 1,430.5 µmol/s and efficacy of 2.2 µmol/J. Coverage is specified at up to 8 × 8 ft for vegetative growth and 5 × 5 ft in flower. The fixture uses a 120° optical distribution in a sealed, water‑resistant housing and includes RJ12 control for external dimming systems, with optional 480 VAC remote power support. It measures 22 × 11 × 5.5 inches and weighs 11 kg, with a rated lifetime over 50,000 hours. Spectrum King backs the SK603 with a 3‑year 90% light‑output guarantee and a 5‑year parts and labor warranty.