I actually ordered a deal that allows you to control the fan speed on your inline fan. I'm going to hook that up and just turn the fan down to an acceptable level where it doesn't make much sound. Hopefully that will work. If it doesn't then I'm going to have to rig something up with those small computer fans and little square inline boost fans. I just absolutely can not have something back there that makes noise. I seriously doubt the neighbor would be able to hear me, but I can't risk that. I want to know I'm growing in total secrecy and not have to worry about being busted.

Even the growlab wasn't 100%. You could make it 100% dark by taping over a few things in the tent if that's what you wanted. If you want something totally light proof I would just spend a little extra money and get a tent like this one Secret Jardin DR80 Grow Tent