I use the eye level option, as my home is not huge and I generally walk past all my sconce lights. that's 66 inches centered for me. I always use a covered bulb fixture (Don't like looking INTO a bare bulb) I often use up & Down shinging sconces.

If your room is large, think about how they look from underneath.

a panoramic view of the room might be helpful to get other comments.

I DO like that fixture!

Thank you, I appreciate your suggestion and the eye level
guide for height. Thanks for your comment on the fixture!

The installation height of the sconce depends on the purpose for which you need a wall lamp. It is important to position the lamp in such a way that no one hits it.

If you just need a lamp as a decor, then there is no right height. Only if you want, for example, to make the room visually wider or higher, then there are some nuances.