Sunshine Systems GS15R GrowSpot Bloom Booster LED Grow Light Bulb E39 Use with your current mh or hps lamp to dramatically increase your yield Bloombooster growspot is designed to enhance the flowering cycle Does not contain harmful metals or gasses like fluorsescent, hps and halide bulbs Use with your current mh or hps lamp to dramatically increase your yield Bloombooster growspot is designed to enhance the flowering cycle Does not contain harmful metals or gasses like fluorsescent, hps and halide bulbs GrowSpot LED grow light uses only 12 watts of power No infared or uv light making them perfectly safe for the home or classroom