I am noticing that most PAR meters her are the "real deal". I am using the PAR meter on the Seneye should I consider an upgrade or make any adjustments? I am becoming more heavily involved in SPS after a few years off from the hobby (roughly 10 but who's counting). And I was wondering the same thing regarding lower light intensity but also spectrum of light. In fact, This question was sparked by reading your article from 2009 -How to make Corals More Colorful Parts 1. In that you mention, " in all cases that blue light promoted the expression of fluorescent pigmentation most effectively. Green light ran second best in promoting fluorescent pigment production, although the filter used by these researchers transmitted a fair amount of blue light." I note in most light bulbs green is seldom "high" and usually on par with red. (i.e. Radion AB setting has green and red set to 24 and that is the highest you ever see green being introduced) So could it be a question of the type of light that reaches the corals versus intensity (PAR) or even a combination - if intensity (PAR) is X then Green must = Y AND Blue must = Z?? Sorry if i am getting you off track please feel free PM me if you feel this will get to far offtrack.