noun
Refers to the red light on the rear of a vehicle that illuminates when the brakes are applied.
制動灯が切れていると整備不良で違反になる。
If your brake light is out, it's a violation for faulty equipment.
Tail light; always on when headlights are on, unlike 制動灯 which only lights up when braking.
Compound of 制動 (braking) and 灯 (light).