Point at least one motion sensor light fixture some distance away from your home, so if anyone approaches, the light will turn on early.

点至少有一个运动传感器，灯具一段距离你的家，所以，有人的临近，将会亮起早。

youdao

Unique Motion sensor light Including Pure white and Warm light---Press the button to change the lighting mode between Pure white and Warm white.

独特的运动感应灯包括纯白色和暖光---按按钮可以更改纯净白，暖白之间的照明模式。

youdao

A sensor channels the light signal along an optical fibre.

传感器沿光导纤维输送光信号。

《牛津词典》

So to be clear, we expect most students to very comfortably pursue the standard edition of the P set, but for this particular P set, and we have about 150 or so of these out on the hallway, and we'll have them at office hours throughout the coming week--this is a little logic board ; with lots of sensors; the sound sensor, a light sensor, a little joystick and the like.

我希望我们大多数同学,研究问题集的标准版本，可编程版有个特殊的问题集，我们会在接下来的几周里，在办公时间为大家做解答,这是个小的逻辑板,上面有很多传感器;,包括声音传感器，光传感器，小操作杆等。

哈佛公开课 - 计算机科学课程节选

Dorset Council contractor SSE Contracting is now changing the light sensor on each light to a timed version in the town's quiet roads.

BBC: Swanage street lights switch-off to save ?150,000 a year

When nearly 30 years ago Dr. Jacob Fraden invented an ear thermometer working on this second principle, the infrared light sensor was so large that he needed a narrow gold-plated reflective tube to channel the light from the ear drum to the sensor.

FORBES: Body temperature.

The lower-end AX100U adds an ambient light sensor that adjusts the output on-the-fly to help counter-act the light in the room.

ENGADGET: Panasonic @ CEDIA - 2 new HD projectors - UPDATE HD