My wife just came down from the snake room saying she'd seen one of my Vieleds trying to sleep while the lights are on. She suggested that "it'd be dark by now where they come from" Now I knew about the twelve hour photo period but I hadn't aimed to get it in sync with Saudi! lol So it's been lights off at about eleven at night and on again at about eleven in the morning. The more I think about it the more I think maybe she's right actually. Maybe I should aim for more eight till eight? I'm in the UK.....