Ma'anar ƙamus na "fitilar walƙiya" wata na'ura ce da ke samar da ɗan gajeren haske mai tsananin haske, yawanci ana amfani da ita wajen daukar hoto ko azaman sigina. Ya ƙunshi bututu mai cike da iskar gas, irin su xenon ko krypton, wanda aka haɗa shi ta hanyar fitarwar lantarki don samar da haske mai ɗan gajeren lokaci. Ana amfani da fitilun walƙiya a cikin kyamarori don samar da ƙarin haske don ɗaukar hoto, ko azaman fitilun faɗakarwa akan motocin gaggawa da sauran abubuwan hawa waɗanda ke buƙatar ganuwa a cikin ƙananan haske. Hakanan za'a iya amfani da su a cikin kayan aikin likita da na kimiyya don aikace-aikace irin su famfo laser ko spectroscopy.