Hi Grim - You seem to be extremely knowledgeable and helpful here so I thought I would pose this question to you.
I'm considering setting up a 48" four bulb T5 retro overdriven by an Icecap 660 with two of the Nanocustoms Par38 20K spotlights aimed at two rock structures for shimmer on a 90 gallon. Any thoughts on whether this is enough light for a 90 gallon future SPS dominant tank? Or should I do a 6 bulb T5 retro and not worry about the shimmer? I really want to keep the shimmer that MH's have and the Par38 spotlights do provide that very well with amazing color. I recently bought one just for testing.
Here's a link to the Par38 Spotlights -->
http://www.nanocustoms.com/product_i...lrrhhj6avuiip0
I currently have two 454 T5's on an Icecap 430 and a 250 HQI Phoenix. I'd really like to get away from MH due to the heat. I already have the Icecap 660 and just need more reflectors, endcaps, and bulbs to setup 6 T5's.
Thanks for the help.
Pete