410.4(D)is very explicit. There are measurements to follow, which really makes this easy code wise. If you measure 8 ft up from the shower threshold, and the lighting is above the "zone", then you are out of the realm of 410.4(D) and any type of fixture can be installed there. I cannot see shower spray going up that high, unless it is intentional.
A shower trim is not required by code, but if one should choose to install one, it is permitted. The lighting may stink, but it is permitted.
