Growking’s Rail Full Spectrum 120 Watt is a passively cooled LED bar using 66 Osram Oslon SSL diodes and an external Boke driver. The single module measures 770 × 90 × 45 mm, weighs about 2 kg, and is designed to operate near 120 W (manufacturer data/topical tests report ~112–117 W typical). Manufacturer-published performance puts photon output around 203 μmol/s. Independent testing and press material recommend each 120 W Rail to cover roughly 0.3–0.5 m² (up to about 70 × 70 cm), with three modules evenly lighting 1 × 1 m. The spectrum is red-leaning full spectrum with a measured peak near 640 nm, aimed at flowering, and Growking specifies a long service life around 70,000 hours. Recommended hanging distance is about 20–30 cm.
