I have a 72" double vanity that is 31" high and 8' ceilings. I'm having a mirror made to match the cabinets. side sconces are not an option because of space with walls. I was considering 26" w by 41" tall mirrors. is that too tall if light sconces above mirror are 7.5" tall? I'm factoring in 6" space between bottom of mirror and top of vanity and space between top of mirror and light fixture. is 8.5" from light to ceiling too little?

I don't have pictures as this is new construction.