While I like the looks of my tank when the actinics are on, and the looks of many display tanks with all their fancy lighting setups, one of my goals for my tnak is to have it looks really nice under fairly standard lighting, I.E., 1x96w Actinic, 1x96w 10kK, 36" power-compact fluorescents. We're currently working on an LED design that, in the end, we hope to able to modify the total out K equivalents on the fly with a built-in controller (within certain reasonable ranges, that is) and/or by replacing "banks" of modular LED arrays. Regardless, I think the "blue tanks" are awesome looking, but I'd rather get mine looking nice under the best possible approximation of natural lighting at depth roughly median to where all the stuff in my tank is naturally found.