Fusionanswered grow question 5 years ago Hps distance ...
Download lux light meter app or something similar for your cell.
5-10k lux - seedlings
15-45k lux - veg
50k+ for flower.
Then just good distance don't burn.
Your questions confusing but figure your asking best way to drop your light hours. Can drop by 15 mins each day for no stress. Or just flip it to 12.