Spectrum King LED is a U.S. horticultural lighting brand founded in 2014 in California. The company designs and manufactures professional‑grade, full‑spectrum LED grow lights for indoor and greenhouse cultivation, serving both commercial facilities and home growers. Its portfolio includes fixtures such as the SK403 and SK603, along with the Phoenix 680W, positioned for high light output with lower HVAC and power costs. Spectrum King emphasizes a white, sunlight‑mimicking spectrum and holds U.S. Patent No. 10,238,043 covering its proprietary plant spectrum. The firm highlights U.S. manufacturing and water‑resistant, low‑maintenance builds, and provides support resources including coverage charts and hanging guides. Products are marketed as alternatives to HPS/DE lighting while aiming to maintain light output over time with extended warranties.
