I found that my basement light had been left on yesterday, anywhere from 2-5 hours in to the dark cycle. The plats are in a grow box, but the door was open. They were regular domestic light bulbs but I fear it may have delayed the flowering. Could this have delayed it for weeks?
Interuptions in the light cycle are not garaunteed to cause major harm to your plant. (if its something small or one time thing..) The interuptions do however bring out the worste in plants, so if you have weak genetics you might see some negative side effects. Think about it tho, in nature.. the night is never perfectly dark.. you have the moon, stars, etc. Get that plant back on track and don't stress over it man.