they look healthy to me i cant tell really how big the buds are but have nice frosting, as for the lights i havent heard much about a 8 hour cycle for light, just to leave them in total dark for about 4 days to a week i think. to get all the thc to form u can as it forms at night. and remember to flush the soil two weeks or so so u dotn smoke the nutes, it will pull the from the leaves insted of the soil and lower the levels gradully.
good luck