I start my seedlings under my little chinese p1000 led about 12 inches away and turn it down so that I read about 300 on my tent buddy app.... That won't be an accurate 300 as its a phone app, but it keeps them stocky... The issue I have is that even though the seedlings have a light right above thier heads, they are always trying to get to the decent light under the HLG's and lean towards them so I end up turning them every day..... Chinese lights look bright, but it says something about the actual quality of that light when the seedlings lean off to a better spectrum