My grow room has two windows that are completely lightproof using encasements built of plywood. I now need to take one of the boxes down to crack the window for exhaust. If I do that with my 600w on, it would be highly suspicious to my neighbors. I also think using a greenlight on off hours would be just as suspicious. So what I'm thinking is that I'll go in there an hour before the 600w kicks on and just use the normal cfl light while I work. But my concern is that this will confuse my ladies photoperiod. They're currently running on a 12 hour schedule, then they'd get 13 hours on the day I do my work, then back to 12 hours again. They're on their 4 1/2 week of flowering btw. Will this affect my ladies at all?