light flashing; flashing light
Refers to the act or state of a light turning on and off repeatedly, often as a signal or warning.
The flashing light at the railroad crossing signals that a train is approaching.
This device warns by flashing a light when an abnormality occurs.
Compound of 光 (ひかり, 'light') and 点滅 (てんめつ, 'flashing on and off').