this box is about 90cm2, with 2x 85w cfl 6700k, plus fans. The Dutch method seems to be a great option, the question is regarding which bulbs should be used 2700k or 6700k for the whole 12/12 cycle, should the 6700k be used on 12/12 and then switch for 2700k bulbs? if so, when should the bulbs be changed for flowering (2700k)?