You wouldn't think it would be very hard to select a mirror and light fixture for the main floor powder room, but it was! Finally, after much head-scratching, I bought a large round mirror, frameless but with a bevelled edge, which looks polished and doesn't distract from everything else in the small room, and it's width is exactly the same as the vanity, so it fits quite well.
The light fixture was equally difficult to decide on. I was looking for something interesting and not a duplicate of the lights in the upstairs bath, something a bit modern to go with the Ikea cabinets. And behold! I found it at Lowes. (Or should I say Lowes and Behold!?) This has three small lamps, each taking a 60 watt bulb. Nice and bright!