QCLED 12 Watts LED Plant Grow Light Floodlight Lamp 45Mil Chip IP44 Waterproof for Flowering Plant, Hydroponics System and Vegetables Cosmos led grow light have 12 LEDs (3 blue & 9 red), ultra bright. Really helps when the plant need extra boost of light, or a few of sun, raining, snowing , dark indoor et This led grow bulb has low power consumptionhigh luminous efficiency and long service life, the electronics inside are stepping down the voltage. the outside is constructed in a pure heat-sink fashion, It does not generate any noticeable heat even 17hrs a day. keeping your temperatures down perfectly These growing lamps emit the wavelength of light which can be fully absorbed by the plants photosynthesis; no energy waste like fluorescent lights etc. 660 and 430nm; 630 and 460nm are respectively 4 peaks of growth spectrum for maximum chlorophyII A and B production. Sources rich in 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 This plant growing light can rapidly improve the health of plant and growing, generally more leaves popping up within 2 weeks of using this growing lamp on a daily basis. Cosmos plant growing lighting is designed to fit standard E27 socket, brilliant all metal housing, Easy to set up and use - no special lamp needed, a desk lamp will do