direct focal illumination

例句：

1. 1. The new LED lamps provide direct focal illumination that is brighter and more energy-efficient than traditional incandescent bulbs.
   新型LED灯提供了比传统白炽灯更明亮、更节能的直接聚焦照明。
2. 2. In the dark room, the only source of direct focal illumination was the single lightbulb hanging from the ceiling.
   在黑暗的房间中，唯一的直接聚焦照明来源是悬挂在天花板上的那盏灯泡。
3. 3. The research team used a camera with a built-in infrared sensor to capture images with direct focal illumination, which could be used for night vision applications.
   研究团队使用了一个内置红外传感器的相机来捕捉具有直接聚焦照明的图片，这些图片可以用于夜视应用。