all the lights were 23W cfls. 4:2 6500k/2700k during reveg with 20/4 schedule (using only 20-20-20 nutrient), then 4:2 2700k/6500k during flowering with 12/12 schedule (using half 20-20-20 and half 12-36-14 until the end of flowering when I will begin 12-36-14 only).