An update on the 10K light. I have had it on my plants for about 10 days. I have noticed a LOT of yellowing from the fan leaves, especially on the GC4 Sativa. My Matanuska turned a dark purple on the exposed fan leaves but the buds seem fine with minimal color changes yet. It is probably too warm for the nice purple to come out, but I'll tr to post a few pictures. I never had things act quite like these are, but it could be a few other changes that I made this grow. I have never seen this degree of purpling on the leaves, though. Total purple, Deep Purple!