Too much light during flower??

i have 5 indicas growing in one side of a closet. the other side of the closet stays open about 6 inches 100% of the grow because the exhaust duct is going out that side. so when the light is off the room still has light. im wondering if the light in strong enuf to go in threw the six inch crack on the side of the closet and affect the plants on the other side. they seem to be flowerring ok. maybe a little slow not really sure. is this enuf light intesnsity for the plants to see????

outside plants have moonlight, so they can grow
depending....not too much light getting in I hope
but keep in mind that growing indoors is all about problem
solving.
Take control and plug that light leak the darker the better.