人类接触光的历史有多久？早在１９世纪之前，火把、烛光、油灯，还有那“才到中天万国明”的明月，一直帮助着从原始走向文明的人类抗拒着茫茫黑夜。仅在百年之前，人类才凭借电力，把黑夜照如白昼，自此“秉烛夜谈”、“掌灯扪蚤”的时代方才过去。到了２１世纪，仅仅是照明? How long has the history of human exposure to light? As early as the 19th century, the torch, the candlelight, the oil lamp, and the bright moon that “only reached the midst of the midst of heaven and earth” had helped to help the people from primitive civilization to resist the dark night. Only a hundred years ago, mankind used electricity to turn the dark night into daylight. Since then, “the candlelight night talks,” and “the lantern fleet flea” have just passed. To the 21st century, just lighting?