This is exactly why I want to switch to 24 hours too. I have already decided that when I flower it will be 12 hours on at night and 12 hours off in the day. For starters I think it would be better to warm the plants at night with the light and keep them cooler with the light off during the day. On top of everything else, I sleep during the day and like to watch the plants too at night. I check my babies at least 10 times a day and could sit and watch for hours I think.