You have to decide what it is you want to do and then pick the lighting that is the most appropriate
Thansk for the advise.
I am upgrading to a larger system and I want to be able to keep clams and sps
corals. The dims of the new tank are 48x18x20, so I am definately looking for intensity.
I guess what I want is optimum health of the system and I wasn't sure if the 20K MH
, while more intence, would provide the correct spectrum of "blue" light needed. Just seems like most people use MH
lighting and I wasn't sure why if you can run 20K MH