当光照正常的时候led灯是灭的，当周围变暗时led灯变亮。
因为光敏电阻受不同光照影响变化很大，所以本次实验的参数是在60W三基色节能灯照射下实验（无日光照射），同样亮度的日光下光敏电阻的阻值会比日光灯下低不少，估计和不同光的波段有关系。不同环境下实验使用的参数不同，大家根据原理进行调整。(When the light is normal, the LED light goes out and the LED light turns on when it gets dark around.

Because the photosensitive resistance by different illumination effects vary greatly, so the parameters of this experiment is to test in the three primary colors 60W energy-saving lamp irradiation (sunlight), the resistance of photosensitive resistance the same brightness of the sun will be lower than the number of fluorescent lights, estimation and different band related department. Different conditions, different parameters used in the experiment, we adjust the principle.)