When you`re trying to determine how far should you hang your LED grow lights, there are two factors to consider: the plant and the light. There are many types of LED grow lights available and since the plants go through many different stages, which means they will have different needs and requirements along the way. LED lights of 1000 watts are recommended to be placed 36 inches away from the plants.
The lights can be lowered to 24 inches during the vegetative stage of the plant, and to 18 inches during the blooming or flowering stages. Plants have different needs during different stages, so you need to be aware of that and make changes to the distance of the LED grow lights as you go along.
Here is the chart of distance between the lights & plants.
