I just use the window for cycling. We have an open concept main floor so it works well. Kitchen at one end, dining in the middle and living room (with tanks) at the far end. We use UTH's for heating with no overhead lights since the tanks are in a very sunny room during the day. In the evening we keep the lights off in the immediate tank area but on in the kitchen at the other end of the floor. It's enough light to see them but not enough that it drives everyone back into their hides.

All my nocturnal guys come out right at 6pm like clockwork. Of course the leos are looking for dinner too. They start giving me the stink eye if they don't see the feeder tank by 7pm. lol