Now I'm not trying to highjack this thread but I saw that you say you use complete darkness until flowers are established. You mean to say you keep them in total darkness for 24 hours a day? I know the kind of darkness your talking about. It's that little bit of light that allows you to make out the objects in your room but you can't really see the floor. That should be plenty dark enough but like the experts say, use a black cloth or something to just cover that light up....shouldn't be too bad though. Good luck bud.Total black is simply insurance. Think about it. Outside you've got all kinds of night lights and plants do fine on their own . . . and then there's the moon.
AS DARK AS YOU CAN GET IT SHOULD BE FINE.
I do total black until flowers established, then don't worry so much about a little bit of light now and then. NO hermies here.
I also stapled a dark sheet up in front of my intake fan, which waves in the breeze while shading the light even more.