what will happen if during 18/6 dark period there is light poison

i am planning on doing my veg room inside my house.the flower room is the garage.what would happen if i have them in my room and during the six hour dark time a lil light will be used.will they turn hermie or what.

More than likely, bad idea.

I would suggest going with 24 hours light during veg. You get more growth and you wont have to worry about interupting the darkness.

the most critical time for absolutely no light is after flowering begins 12/12..people veg in 24/0 and 18/6 some even 16/8, a better idea would be to shield them off somehow
from your little light...but it is debatable whether it would hurt them. as long as it is not an HID that is bleeding in...imho.lw