light source of gas discharge lamp

例句：

1. 1. The light sourceis located in the center ofthe room.
   光源位于房间中央。
2. 2. Thenew LED light source has a longer lifespan than traditional ones.
   新型LED光源的使用寿命比传统光源长。
3. 3. The engineer used aspecial light source to illuminate the dark tunnel.
   工程师使用一种特殊的光源照亮了黑暗的隧道。