movementlights
nounUK /ˈmuːvmənt laɪts/
US /ˈmuːvmənt laɪts/
Lights that turn on when something moves nearby.
The movementlights in the hallway switched on when the cat walked past.
OTHER MEANINGS
2. Lights attached to a moving object or person, such as on a bicycle or costume.
The dancers wore movementlights on their shoes so the audience could follow their steps.
3. Stage lights that change or follow performers as they move around.
The movementlights swept across the stage as the singer ran to the front.
4. Small lights used to show that a machine or system is active.
The movementlights on the control panel blinked green to show the robot was working.