For the most practical setup, aim for your nightstand to sit level with your...
https://www.start-bookmarks.win/for-the-most-comfortable-reach-your-nightstand-should-sit-level-with-your
For the most practical setup, aim for your nightstand to sit level with your mattress top or just 5-10 cm below it. This makes reaching for your phone or a glass of water effortless while you are in bed