flash light bulb

基本解释

A glass bulb filled with finely shredded aluminum or magnesium foil that is ignited by electricity to produce a short-duration high-intensity light flash for taking photographs.
闪光泡一种内部装有铝箔或镁箔的精细碎片的玻璃灯泡，用电点燃以发出短暂的高强度闪光，从而拍摄照片。
dict.cn
A light bulb is disposed on the lamp-socket, which can give out intermittent flash. A screw of the lamp-socket is fixed in the front end of the grip, and connected to the structure of power switch.
灯座上固设有能发出间歇性闪光的灯泡，灯座螺固在握把的前端，并电连接于电源开关机构上；
ip.com
When his eyes locked on mine, I saw the light bulb flash overhead as a grin spread across his face.
当吉姆把目光锁定在我身上时，我彷佛看到他头顶上方出现一个闪光的灯泡，他咧嘴笑了起来。