Nightlight (noun)

A small light that is left on during the night for the purpose of providing a minimal amount of light in a room or area.

Origin:

The word "nightlight" comes from the combination of the words "night" and "light" referring to a small light that is left on during the night for the purpose of providing a minimal amount of light in a room or area.

Examples:

1. She left a nightlight on for her child who was afraid of the dark.
2. He bought a nightlight that projected stars on the ceiling.
3. The nightlight provided just enough light for him to find his way to the bathroom.
4. The nightlight was a comforting presence in the room.
5. The nightlight was energy efficient and used very little electricity.