Hakanan ana kiran masu haskaka gani a matsayin wakilai masu haske na gani ko abubuwan farin haske.Waɗannan su ne mahadi na sinadarai waɗanda ke ɗaukar haske a cikin yankin ultraviolet spectrum na electromagnetic;waɗannan suna sake fitar da haske a cikin yankin shuɗi tare da taimakon haske