Be careful keeping the 1K under 12 inches when bud development starts. I noticed it on my last grow and was suspect and am finding it on this grow and researched the problem, hear is what happened in my case with this particular strain. I have the loveliest temps, low 70's, no cool tube or air cooled hood, and went and had my tops about 7 to 8 inches from the bulb and the high lumen output started to bleach the clorafil in the buds turning the top of my koalas white. I found other folks that have had that same problem when putting the 1K too close, but not with all strains, so keep that in mind when you start getting buds and yes the BB are a all around sensitive strain.
Adieu