im thinking about going AB bulbs. they have this 13K(10K) out. im wondering how it looks like. i have been using XM10Ks and they seems really intense. i like something with more color and also less intensity compare to the 10ks.
The AB 10k was the light in the center of my tank - not as intense looking as the XM's but shine really nice color and I always got good growth from them.