Report Abuse. CFL bulbs are cost effective and run about 6cents a day. A ceiling fan with avg. 1/10th horse power moter will cost an avg. of 26 cents per day for every 24 hours in operation ,then you can keep multiplying the costs for a month or year. ceiling fan with avg. 1/10th horse power moter will cost an avg. of 26 cents per day for every 24 hours in operation ,then you can keep multiplying the costs for a month or year.