Zkittlez by The Pot Factory

First thing led grow lights are not known for producing alot of weight. What they are known for is producing better quality as far as smell, taste, trichomes, and color. They also give off less heat than other grow lights. Second I used to use there 300w and a 450w model put together and the lowest I had those where 14 to 16 inches. So yes your grow light are to close.