DONT ask me how I know.....
I had black trash bags taped up so fast!IKEA or other brand blackout blinds for the windows and in place of your grow room doors..........
You dont want light out the windows...coz it tells everyone you are growing.....it is a very distintive light..cough..cough......
<< auntie at the window ppp
'Twas a sand storm coming in...... .......