I just had a customer ask about installing a recept. in the bathroom of an old house (1940s). It would be easy to come out of the light with the feed but I know it is required to put bathroom GFCIs on a dedicated 20a. circuit. They are now using a (non GFCI) recept. that is built-in to the old fixture. It would be a fair amount of work (and money) to run a circuit to the second floor. Any thoughts?