I'll be honest I was never crazy about any of ATI's stock bulb recommendations and I've tried them all. After a boatload of experimenting the bulb combo i finally settled on from front to back is a little unorthodox and I don't know anyone else running it, but my bulbs are placed in order based on what is under them in each region. My aquascape is a low lying gently upward sloping stack straight across. Going for the grocery store fruit display look with acro colonies. No fancy towers or caves or suspended rock pieces. Just maximum horizontal space for mounting acros. I left only about 3" of sand space in front and sides to hold some of my favorite Zoa and Lps colonies over the years. The rocks are 100% sps/acros. So my order of bulbs was placed accordingly to hit certain corals with certain colors to bring them out best. I've been floored with how fast everything has responded. Newly glued acro frags encrusting over the glue, plugs, and epoxy in just over two weeks time. Combo is as follows front to back:
ATI Blue+
ATI Blue+
ATI True Actinic
ATI Purple+
Giesemann Tropic 6500k
ATI Blue+
ATI True Actinic
ATI Coral+
Looking at it objectively the three front blue and actinic combo give the more colorful fluorescent pigments the ability to really shine, the back half over the rocks where the sps lie is very much white in color. 12k at most I'd say. Warm colors a lot of natural pigments and if you look the spectrum is 100% covered from deep violet up to red with the 6500k bulb parked directly in the middle above the acros. Coral response has been phenomenal running it like this in even a short period of time. Here's an end down shot to illustrate how/why they're arranged like that.
Mind you I have only recently started stocking acros. Tank is 2.5 years old and the dozen acro frags I have are displaying healthy deep colors and encrusting very fast
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