welcome loud...OK 1st you veg w MH and flower with HPS and you could change over if you were using MH, but since you are running HPS already; no change...this grow
change right now to 12/12...you already have flowers, so flower...goodluck, also, before you get bombarded with suggestions about your lack of white plastic or mylar surrounding your plant...you are losing alot of light that would transform into bigger buds, better yield...I'm surprised Z didn't mention both of these problems, well actually the light isn't a problem you just won't be switching to MH to flower, as I said before MH is for the veg cycle(blue light)...hope this helps...more will come.later...P.s. the plant that is stretching could be a male, I said "could be" that is one male trait...if the others are all staying, but each plant can have it's own characteristics, so watch that badboy