In the bathroom with my pivot mirror, there is 12” from the bottom edge of the mirror to the top of the vanity counter. In the bathroom with my oak trimmed longer rectangular mirror, there is 9” from the bottom edge of the mirror to the top of the vanity counter. You have to see at what level your mirror looks best above your counter. It depends on the mirror length and how you want it to look. I think you have to personalize it for each space❣️

Renovating a main bath. And havd a question about the number an placement of mirrors on the vanity backsplashes. One vanity us 66" wide and had the sink on the left side: should there be 2 mirrors above this vanity with sconces on the sides snd middle; or should the sink be in the middle? The second vanity is 60" with a sink in the middle, and we plan to put one mirror in the middle with sconces on both sides.

There isn't a rule for light height since wall heights vary, but placement will control the quality of light output. I don't think you mention if these lights are doing all the work for the room or if there are can lights above, or if the vanities are in an alcove vs open in the room. You could lower lights to 80" but you mention you don't want all the extra empty wall space above. I've seen photos where folks take the mirror higher than the lights and lights are mounted through the mirror. Might be easier if you draw it out to see where you want light placement because mirror size will play into it. For example if vanity height is 36" including countertop, will there be a backsplash included to factor in? If there's a 4" backsplash, and you want light at 80" that still leaves you about 40" to work with for mirror placement. Or you could have mirror custom cut to sit at top of backsplash and go to height that works with light placement. The best lighting is closest to your face, so without sconces, you could look to buy a lighted make-up mirror to get the closer up view when you need it.

This backlit Modern & Contemporary Lighted Fog Free Round Bathroom / Vanity Mirror has separate controls for light and defog but it's unclear whether one can defog with the light off. Unfortunately, the person who created the video didn't answer that questions. Yeah, it's round.