Hey Amaximus, right now since they are babies and I have the light still low on them I'm going 50%. Don't want to burn them up as temps are up in the 90's day time and drop in the 60's at night. I will probably go 75% in a couple weeks while doing some training. I'm running 20/4 with the light and when I go to 75% will cut back to 18/6. Would be nice if I could pull off a win in the party cup grow and add the ferro 150 to the tent.
Ha, It looks as if your running your setup the same as me, Right down to the 20/4 schedule. Except I think I am going to maintain the 20/4 schedule from here on out so I can grow autos in the veg tent as well as give the girls extra time to recover from the serious mainlining I'm doing to them.
Once your temps go down it is smooth sailing. We still had 80s/90s when I hooked up my ballast and now its down to mid 60s/70s (and going lower) from here on out. It still gets to around 83/85 in the tent @ 600w but I'm completely ok with that considering the summer we had.
Ahh, The party cup girls. Right now they are the stars of my grow, which is nice but also underscores how badly I planned my next grow. heh. At least the girls pistils are starting to turn... I imagine yours are or will be very soon as it seems ours plants seem to be on the same pace.
Looking forward to the updates...