MY grow rooms has a 400w switchable HPS/MH .Two osculating fans, Two bubble machines and bubble bucket. I have them on the 18/6 ratio. Using Rockwool hydropon. Had a previous harvest that had a pregnant female Ams got pregnant off of male Big Bang. Got over 260 seeds. Mylar on walls Plants: 8in away from light. Temp: 85-90F These germinated and got to this stage in 24 hours flat.