COB GROW 12W Led Grow light Bulb Red Blue Grow Bulb for Garden Greenhouse and Hydroponic Aquatic , E27 Socket , 3 Bands (12W) LED Grow Light has 12 LED (3 blue and red 9). Really helps when plants need additional light, or a few sun, rain, snow, dark room and so on. This led grow bulb has low power consumption,high luminous efficiency and long lifetime.Heat-conducting aluminum alloy board and passive heat sink quickly reduce heat and keep the light cool .Cooling effect is very good. Ensures the normal work environment of beads, prolong the life of the lamp. The grow light provides exact wavelengths at 660 nm, 630 nm, and 460 nm. This corresponds to the peak of the photosynthesis activity spectrum & will maximize Chlorophyll A and B production. Red light are more efficient and beneficial for photosynthesis, best for blooming and fruit .The Chlorophyll and Carotenoid need blue much, good for the photosynthesis, best for promoting the leaf. Standard E27 socket, no special socket required, easy to set up and use ,you can use the light with any standard E27 base. 12-Month Free Warranty and professional technical support.