I have already sexed them. They are on the 4th week of flowering. But I was wondering if I could switch the times the lights are on, instead of being on from 6am-6pm I'm thinking on putting them on from 7pm-7am. In order to do this the light will have to be on from 6am-7am(nxt day) or off from 6pm-7pm(nxt day) so that will be either 24 on for a day or 24 off for a day.

I would like to do this to keep them warm at night since it's winter here.