@CleanAirStars @eswillwalker @JimRosenthal4 Some of the Coway ones do have a separate light. Some other ones have a light for the filter but just say to clean the prefilter "regularly".
@CleanAirStars @eswillwalker @JimRosenthal4 Coway 的一些确实有单独的灯。其他一些过滤器有灯，但只是说“定期”清洁预过滤器。