Growstar 300w LED Grow Light for Hydroponic Indoor Greenhouse/Garden Plant Growing 9 Band (3W) Growstar 300w LED Grow Light for Hydroponic Indoor Greenhouse/Garden Plant Growing 9 Band 100pcs LEDs, brighter than other LEDs. 3w Epileds high power Par Value ensured, high lumen, high brightness. Long lifespan for growing indoor/greenhouse plants. With 1 big cooling fan, Light won't generate any ultra heat even works 18hrs a day, keep light has longer service life. 9 Band:4500k-4% 3000k-4% 730nm-4% 660nm 22% 630nm-46% 610nm 6% 460nm 8% 430nm 4% 400nm-2%.This full spectrum 9-band lamp uses professional light ratio developed after continual tests by the growers and upgrades by the professor. Space Saving Design:2 switch to change the 2 mode,vegetable growing and flowring /friuting stage.