Shenzhen Herifi tech CO., Ltd Tel: 755-23065830.  Contact person:Stella Liu Characteristics: 1. Use 3W high quality LED lighting source, the lifespan is over 50000 hours. 2. These Herifi LED grow lights use only about half the electricity as HPS lights, and produce much more yield per watt. 3. Utilizes a thick, heavy duty aluminum heat sinks that dissipate heat much more effectively than other LED lights, making Herifi LED grow lights run more smoothly and keeping the temperature low, thus expand the lifespan. 4. Special design in fans producing virtually no heat. 5. 60 90 120 degree lenses for your choice, the pene-tration is more outstanding, maginifing the Lumen and PAR. The detailed data is above, seeingthat if you need. 6. The height are changeable according to different plants and environments, sending the line for you to adjust that height more convenient. 7. Environment-friendly, no mercury and other harmful heavy metal. 8. The unique appearance make it more exquisite and convenient to ship. 9. Any ratio could be done according to your requirement, including red, blue, orange, yellow, UV, IR and white lights, providing the plants needed the nutrient light, promoting growth and flowering large yields. Our suggestion is full spectrum,red: blue=8:1 or 7:2, red: blue: orange=7:1:1. (Red: 620-630nm Blue: 460-470nm Orange: 610-615nm). Usually, 430nm produces better growth sugars in plants and are the key to fast growth before flowering. 660nm makes special sugars suited for fruiting and flowers. 730nm stimulates the uptake of both 660nm and 430nm light waves. Installment: After opening the package, and find a small plastiv packing bags with four rope, get it, inseting each rope in that four holes that back of grow light, just like picture one. Then choose one proper height, haning up the wire, it is finished. Connect the power supply, the grow light will begin to work properly.