Question:  Karl, can I have an exposed light bulb over the shower compartment in a new home?

Answer: No. This is terrible on so many levels.  Remember safety first.  2017 NEC Section 410.10

Luminaries over the shower must be suitable for wet locations.  There is also a zone above the shower/tub which limits what can be installed.

No exposed bulbs, this could shatter leaving glass shards to walk on.