I appologize I don't understand what you mean by split lighting, is that the same as a power compact?
Anywho, I'd guess somehwere half way up the tank, and on the low-med end for flow. Check for feeder tentacles at night and give it a little cyclop eeze and brine, it'll love you for it!
It really depends on the light it was used to before, maybe it had MH or the natural sunlight, in that case a little higher may not hurt.