We think the room is sealed pretty good...we used the plastic reflective mylar and gorrilla tape to seal from top to bottom...when the 6 in can fan is on pulling air thru the charcoal filter thru the lite into the can fan blowing out the window the walls are pulled inward pretty good....what we are thinking is that if we run the co2 for the first 15 minutes or so when the lites come on we would use timers to shut off the fans and the co2 on and where wondering if doing this every for hours thru the lite cycle would help meet our goals or do we need to use more often ect..the room stays around 75 when the lites are on and humidity varies from 34 up to about 48 pct during the day......we do not use any air conditionar or heat other then the fixed air blowing thru room...the big lite comes on about 5pm or so and runs until 5am....trying to run the big lite in middle of nite when rates are cheaper(is this a good idea ?)
thanks again as I am really starting to get the hang of this but know I have so much to learn and enjoy talking to you all about what helps us all..

I hope I have given enough background on this project...

retired and happy.