For a number of pragmatic reasons, many seasoned travelers have the minor but sensible habit of leaving the bathroom light on while they are in a hotel. Here’s why:

- Nighttime Directions
Getting up in the middle of the night to use the restroom can be confusing in hotel rooms because they are new places, especially when there is complete darkness. There is just enough light to move around safely without fiddling with light switches if the bathroom light is kept on (with the door slightly open).
2.Accident Prevention
The layout of the furnishings in many hotel rooms is different from what you’re used to at home. You could get hurt if you trip over a chair, luggage, or a lost shoe. A low light level in the restroom reduces the chance of trips and falls.
3.Steering Clear of Unrest
Turning on a bright ceiling light in a room you share can wake up your family members or your partner. There is just enough light from the restroom to see without bothering everyone else.