A light fixture that is intended for showers is fine.
From the esa site.
http://www.esasafe.com/faqs.htm
From the esa site.
http://www.esasafe.com/faqs.htm
Question
Does the Code permit a light fixture to be installed in a shower?
Answer
Yes, as long as the fixture is approved for wet locations.
Rule 30-318.
Ontario Electrical Safety Code 25th Edition/2012.