Argh! I wrote out an entire thing and it just got blipped out because I hit another key and it changed web pages!!!!!
Oh well... anyway cooling fans from what I gather aren't really meant for the bulbs but for the tank's water. 1) The evaporation rate goes wayyyy up without a fan... which means more money spent on RO
water from the LFS
. 2) Again without the fans... also means way higher tank temp which is crucial to keep stable in a reef tank, or in most tanks for that matter. I don;t own a reef tank myself, but have a friend who has two MH
and 4 VHO
's and lemme tell you the things he scaremed about when a friend of his brother's broke a fan and didn;t tell anyone about it. Thats when I learned what I am telling you now :P HTH