fail-safe lighting
nounUK /ˈfeɪl seɪf ˈlaɪtɪŋ/
US /ˈfeɪl seɪf ˈlaɪtɪŋ/
Lights that still turn on when the power goes out.
The stairs have fail-safe lighting so people can see during a blackout.
RELATED WORDS
OTHER MEANINGS
2. A lighting system designed to keep working even if one part breaks.
Engineers tested the fail-safe lighting before the building opened.
3. Lights in a car or machine that stay on if the main system fails.
The plane's fail-safe lighting guided passengers to the door.
4. The idea of making lights that cannot fully stop working.
Fail-safe lighting is a key rule in tunnel design.