It is very important to avoid looking directly into the wall lamp, otherwise you will be dazzled. For a downlight and/or uplight wall lamp, it is advisable to mount it at eye level.
As a rule, we assume a height of between 1.70 and 1.80 metres.
If there is a seat near the wall lamp, be careful. You don't want to be dazzled from there either. Therefore, you should simply align the wall lamp according to the current situation in the room.