there's no way "all kinds of things" can happen. we're talking about needing enough light to fire up photosynthetic processes here. a pinhole is incapable of that. i guarantee you can not locate a pinhole of light beam on a leaf in a dark room unless it's a pencil hole or bigger. it's far more likely that you corrected some other issue (like your feeding you mentioned) that resulted in the nanner cure. think about it... people run fem seeds outdoors right... is it ever so dark outside that you can't see your hand?? rarely. especially when you're plants are in an area that is wide open to receive a lot of sunlight, you're also going to get ambient light from moon/stars and nearby cities.