Tefi yana nuna duhu ja mai haske, zane-zane mai haske, kuma yana hana hasken ultraviolet (UV), wanda ya dace da amfani da nau'ikan ayyukan fallasa, kyakkyawan shadowing, tsarin tsarin layi da yawa na musamman, ba shi da sauƙin haɓaka da haɓaka, don kare PCB.