Bird box with clear roof

Don't know about big windows, but lights inside don't seem to bother them at all. A lot of us here are running some sort of LED illumination to get a better picture, and certainly for bluetits this doesn't seem to be a problem. It's also pretty common to have some sort of window in the side of a box, but I must admit I've never seen one with a fully transparent roof - good idea, but wouldn't really work for me as I have all my camera gear in the "loft space".