Here's some advice on this subject from our guide to finding the right size lighting: When mounting swing-arm wall lamps beside a bed, get the most ideal height by sitting in the bed normally and then having someone measure the height from the floor to just above your shoulder. The most ideal spot for wall lamps is between your head and the work surface (in this case, things like a book or tablet computer).

I hope this helps--let me know if you have more questions or would like some product suggestions!