First, if you’re going to install recessed fixtures, use them only to highlight other walls—not over the sink area. This will create harsh shadows on the face and make it hard to apply makeup or shave. Use a recessed adjustable low voltage fixture and put it on a low voltage dimmer. This will have the smallest aperture and the most flexibility. Option 1: The best thing to do would be to install three light fixtures, mounted horizontally on the mirror at 5 feet, 6 inches from the floor and 1 foot, 6 inches on either side of the sinks (approximately 3 feet apart from each other). This spacing can be modified a bit, based on how far apart the two sinks are from each other. If the sinks are very far apart, you’ll need two pairs of sconces for even cross-illumination at each sink. Put them on a dimmer, so you can have less light when brushing your teeth and more light when doing heavy-duty beauty treatments, like spackling. This solution would require replacing the existing mirror, though. Option 2: Hang pendant fixtures from the ceiling, so they are 5 feet, 6 inches from the floor and spaced evenly between the sinks. Use two or three pairs of pendants based on the sink spacing. These, too, should be on a dimmer. This scenario would not require replacing the existing mirror. Option 3: The bare-bulb light strip you have is quite glarey. You could replace it with a fixture that has a frosted glass casing to provide more diffuse light. You could use two 3-foot units to create a run of 72 inches. Put them on a dimmer, too. It would not require replacing the existing mirror. This is the least effective of the options, but one you could do yourself.