Most Efficient for Photosynthesis Plants do not use the entire spectrum of light. The chlorophyll and carotene only absorb the light at the range of two particular wavelength(blue 400-470nm and red 610-720nm). The light is designed to produce the most efficient wavelengths of light to produce peak photosynthesis. Better Growth With 3 blue and 9 red light， the LED grow light gives off both red and blue light which is important for maximizing growth in plants. Red light is good for budding， flowering and fruiting when blue light is to promote leaf. Less Heat， More Growth With unique design and aircraft grade pure aluminum， it keeps cooler in temperature even after 24 hours continuous use without the worries of over heating. Inherently Safer Technology No radiation and other side effects， please feel free to use Features: Led Spectrum: 9pcs Red(660nm 6pcs; 630nm 3pcs); 3pcs Blue(460nm 3pcs) Power: 12W Socket type: E27 Suggested Irradiated Distance: 1.7ft-5ft Irradiated area: 2.6-15 square feet. Package Included: 1 *12W LED Plant Grow Light (E27 socket)