2 sentences

1. 舞台上的聚光灯突然亮了。

   wǔ​tái shàng de jù​guāng​dēng tū​rán liàng le.

   The spotlight on the stage suddenly lit up.

   Source: Dong Chinese Dictionary

2. 聚光灯突然闪亮，照在了舞台中央。

   jù​guāng​dēng tū​rán shǎn​liàng, zhào zài le wǔ​tái zhōng​yāng.

   The spotlight suddenly lit up, shining on the center of the stage.

   Source: Dong Chinese Dictionary