亚州AV日韩精品_一区二区三区无码视频在线播放_亚洲成人无码免费毛片_免费观看国产精品久久精品国产**电影app_亚洲曰韩欧美国产精品一区二区三区_亚洲强入中文字幕乱码_啊轻点灬大JI巴太粗太长在线了_性直播视频在免费线观看_无码一级毛片人妻开车黄_中文字幕av资讯

  Photometric Flicker is a process that light changes quickly and periodically over time. Lots of artificial light sources exist photometric flicker, such as traditional fluorescent lamp and dimmable LED. Unfortunately, more and more researches show that flicker threaten people’s life and heathy.

  For this reason, we researched specifically for flicker test, and developed a full-automatic flicker measurement and assessment instrument —— FP2000 Instantaneous Transient Digital Photometer and Flicker software.