Durk, I was doing something similar until this weekend. Instead of the HPS, I was putting my babies outside for about 10 hours of good sunlight and then supplementing with 6 hours of CFL light. They are doing pretty good so far and resemble yours, although 2 of mine "stretched" a little bit - attributable to insufficient CFLs earlier on.
Im thinking of taking like 2 clones from my one female plant..( out of three !! >.<) and putting them in the flowering place for twelve hours when the light is on and then putting them under a really bad light for the other 12 hours. would that work?