Efficient LED combination for indoor plant growth: This grow light uses 80 LEDs in total, with 32 red, 12 blue, and 36 fullspectrum diodes to support plant growth without sunlight. Spectral options to match growth stages: Full Spectrum (380 nm to 800 nm) is suitable for all plants to root and sprout. Red (660 nm) + Blue (460 nm) spectrum supports blooming and fruiting. Red + Blue + Full Spectrum (with Warm White) provides a balanced mix to fuel vigorous growth. Upgraded auto on/off timer: The circular memory timer automatically turns the light on and off every day according to preset intervals: 3 hours (Blue), 9 hours (Green), or 12 hours (Red). No manual operation is needed while you're at work or on vacation. Note: The timer must be reset if the grow light is powered off. 10 dimmable modes for various growth stages: The unit offers 10 light intensity levels and 3 spectral modes to accommodate different stages of plant development. Visible quality and adjustable design: USB power compatibility allows connection to USB ports or AC power (adapter included). The fourhead light features a 360degree flexible gooseneck for precise positioning. A sturdy metal clamp enables secure placement on desks, shelves, or other surfaces.