Revegging plant during flowering cicle

Excess of nitrogen can cause such irratic grow, but 99% of time its light leak, they looks reveging, once i hit timer and 15 min switch went up, they had 15 min of day in mid of night, begining was even worse than yours. Check light, maybe she broked and has some light going, close ypurself inside of tent for 10 min during dark time, you will ser the reason if its not some switch like in my case.