My parents house is like that, but there’s a wall with a wide doorway into the area with the vanity, so it’s open but also easy to close off by just putting a curtain rail up. It’s also oriented to the room such that if you only use enough light at the vanity to wash your hands for a midnight potty run, it really isn’t enough to bother someone in the bed if you place the bed sensibly. Getting ready in the morning would be trickier if you needed to do makeup and so on so needed proper lighting, so that’s where a screen or a curtain would come in.

I had the exact same problem. I picked out the vanity I wanted but did not think about the fact that it wasn't made to sit flush against the wall. I spent a month looking for something else, but in the end we decided to go with something shorter and have it not be against the wall. But we were going from 72" to 60" which is probably not workable in your mom's situation. I did find a lot of vanities that did have flat sides and could work in a corner, if you are willing to have the countertop fabricated. They just need to not have any trim detail on the top or bottom like the one you picked out does. I would just look at the ones without the pre-made tops. Because the pre-made top will still leave you with a slight gap because of the countertop overhang. This is an example: Avanity Modero which is sold everywhere, not just at Lowe's. The cabinet we ended up buying is an Avanity Madison which won't work for you, but I assume it is of similar quality. We are pretty happy with it. The drawers and doors have soft close but I do feel like the glides in my Ikea kitchen drawers are better quality. It is very pretty and I wanted a stained wood so I am really happy with our choice. If I had been willing to go with a painted finish, I think we might have stuck with the 72" Modero.

Here are five: https://www.overstock.com/Home-Garden/Clay-Alder-Home-Juneau-Douglas-3-light-Frosted-Glass-Vanity-Fixture/20254730/product.html?refccid=WAG6BR3VPYBYDESL2XQEITBRLA&searchidx=10 https://www.overstock.com/Home-Garden/Waterhill-4-globe-Chrome-Bath-Lighting/9275808/product.html?refccid=WAG6BR3VPYBYDESL2XQEITBRLA&searchidx=27 https://www.overstock.com/Home-Garden/Iso-3-globe-Chrome-Bath-Lighting/9275807/product.html?refccid=WAG6BR3VPYBYDESL2XQEITBRLA&searchidx=41 https://www.overstock.com/Home-Garden/Moen-Oil-Rubbed-Bronze-Bath-Vanity-Lighting-YB2262ORB/10610027/product.html?refccid=WAG6BR3VPYBYDESL2XQEITBRLA&searchidx=48 https://www.lampsplus.com/products/george-kovacs-bronze-11-and-one-quarter-inch-high-half-shade-wall-sconce__26054.html

To Apple_Pie_Order, Thank you for your input! --- the 40 watt equivalent LED bulbs I'm trying to use are 450 lumens, daylight, and 5000K(color). They are standard bulbs, medium base, non dimmable. To Sammy, Does the actual fixture have to be a dimmable fixture or is it all in the wall switch? Thanks for your input!