yea, i am pretty sure that if light is coming out from the inside of the tent, that light can also enter through those same holes, it isn't a problem yet,cuz the t5s are on 24/7, but i will be using a 5 x 5 jardin to flower and can have no light leaks, but yea rookie i would tell the guy at the shop that he is an idiot, a lght leak isn't one sided.lol, if any1 has any suggestions it is right around the front where you are constantly opening the tent, so tape isn't really an option..peace Burn

Secret Jardin all the way... A newer company out of the UK - Google it...

I like their "Dark Room" series - they come in a 4'11" x 4'11" which is perfect for a 1000w HPS

I know the DIY guys knock the tents but the set up is literally done in minutes...

The frames are sufficient for hanging your reflectors and exhaust... even a small carbon filter...

A few feet of ducting and all the ventilation is in place ready to grow...

And they're affordableenough to make it worth it.