How much does one light bulb cost per hour?

An incandescent light bulb costs about 50 cents and lasts about 750 hours. If you were to leave a 100-watt bulb burning for 24 hours each day, 365 days per year, it would use 876 kilowatt hours per year. read more

It depends on the type of light bulb. If it is a incandescent light bulb of 100 Watts it will use a tenth of a kilowatt hour per hour so if your electricity cost you $0.10 per kilowatt hour it will cost you about a penny for an hour. read more

2. Electricity costs $0.10 per kilowatt hour. This is roughly what the nationwide average is, and roughly what we use. 3. The average bulb in our home eats 20 watts. We use mostly CFLs, so this is a rough estimate. read more