This article presents some data on the underwater light field on a reef and compares it to the artificial light field over our reef aquaria, along with discussion of other features of natural lighting that are often not simulated in our aquariums.
http://www.advancedaquarist.com/2005/8/aafeature#h3
some light reading?
http://www.advancedaquarist.com/2005/8/aafeature#h3
some light reading?