光灯

• light modulation

例句

1. 舞台被几盏聚光灯照后了。
   The stage is lit by several spotlight.
2. 警察挥动闪光灯让那辆车停下。
   A policeman flagged down the car with his flash light.
3. 我拍这张照片需用闪光灯，这里光线不好。
   I'll need flash for this shot; the light isn't good enough.