Hi
@jacare111 the power of the lamp is always a factor to take into account.In the vegetative phase of growth they do not need the light so close, and the higher the light, the more your plants will stretch the search for the light source to place at 50cm -120cm depending on the lamp power is more than good at this stage. in the flowering phase, place the led as close as possible to the buds 30cm-40cm always with a pointed bud and be careful not to burn the buds, to check if the led is close to the level of burning or not to put the hand stretched even by on top of the bud with the palm down for 1-2 minutes, if it starts to burn or you feel your hand too hot the same will happen to bud, it is the best way to check. good luck mate 👍🙏