I think your being overly cautious Crop. Taking pics at lights put has no effect. When I take mine, I go in about 5 min. before lights out and start taking my lights on pics and I'm standing there right when lights go out and just continue shooting for a few more minutes and then make sure everything is closed up. This will never have a negative effect on your plants. Just so you know, having rules is great, but ones that dont make sense need to be disobeyed like marijuana laws. I know your still reading this thinking who cares, I'm still not going to do it, but if you do, no bad will come from it(unless you get so excited to be in there during the dark and dont want to leave and find yourself eating your girls to stay alive in the middle of the night.)