Non-dimmable A19 LED grow light lasts up to 25,000 hours, Red spectrum enriched for budding and flowering. Emits more light in the useful 450nm blue and 655nm red spectrum than regular white LED bulbs. Rated for high humidity use. Instant full brightness. 9 watts, 120 volts, UL/CUL Listed, FCC Compliant. 4.5" length x 2.25" diameter.