They only used electric lights from 6: 00-8: 00 PM; otherwise they had to light candles. Because the precious fuel had to be carted up the mountain on someone's back, it had to be conserved.
能用在日常生活的是每晚在六點到八點電燈照明，其餘時間只能點蠟燭，因為燃油要背上山需節省。