No, that's fine. As long as you make sure it's actually DARK when it's supposed to be dark, they won't know the difference. Many people do that to prevent heat problems (i.e. using HID lamps at the hottest of the day). Fix any light leaks, you'll be fine.

What are your temps? What ya growin'? How many plants?


The Fog :rastasmoke:


Edit: Just noticed someone beat me to the punch.