Led Grow Light Distance Chart. The general rule for the placement of led grow lights is that it should be 18 to 42 inches above your plants. Grow light distance vs coverage.

The distance will actually depend on the type of led grow lights you’ve decided to purchase. The general rule for the placement of led grow lights is that it should be 18 to 42 inches above your plants. However, this general rule is only to give you an idea.