Chalice coral lighting level

[downset21]

I grow two types of Rainbows (Gonzos Motor City Mayhem and Rainbow Crush from Cornbred) in my frag tank under Metal Halides at 500+ PAR. They do not need anywhere near this amount of light, but they grow fast and are colorful. I have kept them lower in my tanks at about 200ish PAR also under Metal Halide. I did not find that they like to be in the shadows, or anything. I do not have any areas with less light than this, but it seems like they would probably be OK.

I have never spot fed them.

I have a CB rainbow crush that isn't doing well. I don't know my par ratings but I am currently trying another spot in my tank. It wasnt doing well under an overhang. I currently have it in a spot where there is still shade, but it has slightly more light. (radion gen3 and t5 supplemental lighting). Can you share a picture of your chalices?