Fashewar Shenhai-Hujja
Wasu fitilu masu hana fashewa suna zuwa tare da garanti na shekaru 5. Duk da haka, lokacin garanti na yau da kullun don fitilun da ke tabbatar da fashewa shine 3 shekaru.
Kamar yadda shekarun fitilun da ke hana fashewa, Mabubbugar haskensu suna yin raguwa da ƙarfi. Yayin da wasu kwararan fitila na iya wuce shekaru biyar, Batu na farko shine yawanci akan tushen hasken kanta. Bayan shekaru biyar, wasu kwararan fitila na iya daina aiki.