Well I have ordered another SS400 my grow is gonna be bigger than expected. so I will switching to 12/12 when the new light arrives and finishing up the flowering phase with two SS400s' that should give me 664 watts I think. As far as the one light I have now it has performed flawlessly in Veg. My only complaint is I get bleaching on the liberty haze at 18 " so I have raised the light to 22" and the plants seem to be happy. I will soon start the flowering phase and keep you updated on the progress.
Ok I switched to 12-12 one week ago Sunday and my girls are already showing signs of flower. I started a diminishing light schedule by going from 18-6 to 14-10 then every week after that I reduced the lights on time by 1/2 hour. All the plants except for Lucy are showing signs of flower they were all vegged for 7 weeks Lucy on the other hand has only been vegged for 5 weeks