To get the perfect bedside table height, aim for the top of your nightstand to...
https://telegra.ph/How-to-Perfectly-Position-Your-Bedside-Lamp-When-Your-Nightstand-is-Too-Low-04-08
To get the perfect bedside table height, aim for the top of your nightstand to sit roughly 5 to 10 cm below the surface of your mattress. This keeps your lamp and phone within easy reach while you are in bed