Can someone help me with light schedule.

would it be fine to switch to 12/12 from 11/13 on one plant thats on flowering day 48?, i had 50w of hps and 82w of cfl, now i just have 100w hps. so can i just switch it to 12/12 for the last weeks to get thicker buds?

Yeah it should be fine to switch from 11/13 to 12/12 there's not much of a differance.

why not just go to 12/12 from the start?