Pick a light regime and stick with it. In your case, go to 12/12 immediately for several reasons:
-Box WAY too small to support the # of plants in there to harvest
-Appearance of heat stress and possibly overwatering; ventilation and/or drainage appear inadequate
-Multiple plants in one pot= bad and killing males ASAP is of prime importance.
-Soil in box too heavy; I see no lightener. As such, this is definitely going to be a learning experience and you don't want to waste time vegging longer
-Plants are hungry and need to be fed.

Get this cycle over with and start the next one correctly... 1st link in my siggy is good info. Start in small, individual pots in light soil with proper feeding and ventilation.