nightlight
nounUK /ˈnaɪtlaɪt/
US /ˈnaɪtlaɪt/
A nightlight is a small light that stays on in a dark room at night.
She turned on the nightlight before going to sleep.
OTHER MEANINGS
2. A faint glow or soft light seen at night.
The moon cast a nightlight over the quiet garden.
3. A person or thing that provides comfort in a dark or difficult time.
Her kind words were a nightlight during his hardest days.
4. A small light used to guide someone in the dark, such as along a hallway.
They left a nightlight on in the hall so guests could find the bathroom.