Gro-Drone 4 is a four-COB LED grow light from Lientec LED’s Gro-Drone series. Built around Cree CXB3590 COBs and Mean Well drivers, it offers selectable white spectra (3000K/3500K/5000K/6500K) and interchangeable 60°, 90°, or 120° lenses to suit veg or bloom layouts. Lientec’s 4‑COB configuration pairs with an HLG‑320 class driver, running about 75 W per COB (~300 W total). The passively cooled design targets mid-size canopies and supports dimming when used with the appropriate driver. As with other Gro‑Drone models, the lamp is assembled in Germany and supplied with hanging hardware.
