im on my 1st wilma 8 grow and i run full for 18 hours on blue flooders an half way 3 hours through the 6, im in clay pebbles,sensi a&b grow and bloom, i will after 3 weeks veg add bud blood, a&b bloom, big bud, pk 13/14 once only 3 weeks from crop time, just on 3ed week and they are nice and big and look very good to me, good luck