distance from light

Hey everyone, just bought a lux meter for my LED lights. Just wondering what my readings should be for optimal growth? So I can find the right distance for the ladies.

hello friends - a very quick question. i have a new spectrum king 400w led and i'm about to start my first grow using it. can any of your find minds suggest what distance my light needs to be from the pot. i'm sowing directly into the soil so am a bit worried regarding the intensity of the...