Pure indirect lighting such as cove lighting is great for "mood lighting," but not so good for task lighting. I'd sugggest a conventional hanging or surface mount fixture that provides both direct and indirect light. That will reduce shadows and give you ample light. Mostly likely only one fixture, maybe two, will be required. This will probably give you a nice cost savings over multiple recessed cans, and will also save electricity. Supplemental lighting with sconces is a good idea for those annoying times when you're trying to get that darn little speck out of your eye, or apply makeup carefully. A surface mounted light bar or even (dare I suggest it? ;-) a linear fluorescent fixture above the vanity or mirror might be less likely to glare in your eyes, depending on placement.

If you don't mind spending more-go to Pirch. It will be all coordinated, and somebody will stand behind that order (they also have the best coffee shop ever..drink all you want while there..it's free. they''ll offer you wine and cocktails too if you think you won't find it useful when putting together all these damn faucets-you're mistaken lol you can even take a shower there to try it. really. and have a food made for you-so you can see how a stove works..)) they're very high end, luxury store of course, so Kohler probably would be the cheapest they offer lol..but they do try to match the prices to other stores etc. the service is very impressive. https://www.pirch.com/home they have a store in New Jersey so it seems we used them only for one thing, in the end(the tub..and they switched it for us when the build went wrong lol..so we have a different tub but at least it was handled, you know?) ..otherwise we wanted to save and went for online shopping all over the place, lower prices, etc...but let me tell you..if I only knew what I know now about online shopping for plumbing etc...I'd stay with that Pirch..and pay twice as much..and have better complexion and lovelier smile right now:) Sorry no experience with Ferguson, at least not with anything big..I know people like it though, and prefer it to lots of other places

Ive been reading that as well, however the Vanity LED Mirrors would onlybe about 40 watts each, so not enough for the whole bathroom. I wonder if I should scrao the mirrors and get strong side lights instead? Or maybe an overhead diffused light in addition to the lighted vanities but positioned in the walkway?

You have a dropped ceiling in this area because, as you can see in the photo, it accommodates a duct for HVAC or an exhaust fan. Your current fixture may be surface-mounted because of the duct. You won't know if there is room for recessed cans until the ceiling is opened, or you look down from the attic if there is attic space above this room. I would run your mirror from corner to corner, install sconces through the mirror and get rid of the overhead lights. I doubt you need them. The lights in front of the mirror will provide double the light.