This happens during the late afternoon about 4 or 5 hours through my light cycle just after my whites, greens, and reds start to ramp down and then it's just the blues/uv, and this is only on the tank for 30 or 40 minutes but I think the tank likes it!
Basking in morning light
Beautiful, love the sun lit stuff, always awesome to see the natural coral colors !
Just caught this in my 70G. When the sun hits the corner of the tank it makes a little reef rainbow