@PotatoClose @PSQ17266 @Kit_Yates_Maths That is one "LED light bulb", which is not remotely enough for a classroom. Lighting would usually be hundreds of watts and an air cleaner <100 watts, more efficient models even less.
@PotatoClose @PSQ17266 @Kit_Yates_Maths 那是一个“LED 灯泡”，对于教室来说远远不够。照明通常为数百瓦和空气净化器