Kayan aiki ne da ke samar da ƙarin haske a kusurwar hanya kusa da gaban mota ko a gefen ko bayan abin hawa. Idan yanayin hasken hanya bai isa ba, hasken kusurwa yana taka muhimmiyar rawa a cikin ƙarin haske kuma yana ba da garantin amincin tuƙi. Irin waɗannan fitilun musamman ga yanayin hanya yanayin haske ba su da isasshen yanki, suna taka muhimmiyar rawa a cikin ƙarin haske.
Inganci da aikin fitilun mota da fitilun suna da matuƙar muhimmanci ga lafiyar ababen hawa, ƙasarmu ta tsara ƙa'idodin ƙasa bisa ga ƙa'idodin ECE na Turai a shekarar 1984, kuma gano aikin rarraba haske na fitilun yana ɗaya daga cikin mafi mahimmanci a cikinsu.
