How much does it cost to light two 100 watt bulbs for five hours a night for 30 days?
- The DevilLv 71 month ago
whatever you pay for 30 kilowatts.
- JetDocLv 71 month ago
That would depend on what your local electric utility company charges for power.
- DimoLv 51 month ago
2 bulbs x 100 watts x 5 hours x 30 days = 2 x 100 x 5 x 30 watt-hours.
Which equals to 30000 watt-hours. Which is 30 KWH.
Where I am, power is 15.2 cents/KWH, so it would cost me $4.56
- curtisports2Lv 71 month ago
Electricity costs vary everywhere. What my utility charges per kilowatt hour may not be the same as what is charged anywhere else. You would use one kilowatt hour per day if those are incandescent bulbs. At an average cost of 12 cents per kilowatt hour, it would cost $3.60.
Energy efficient bulbs would obviously cost less.
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- ScottLv 61 month ago
It depends on what your electric utility charges per kilowatt hour.
- DanLv 41 month ago
About $3.50 - depending where you live. If you used LED equivalent bulbs the cost would be about 35 cents.
- Anonymous1 month ago
Depends on power costs. 200 W = 0.2 kW
Multiply 0.2 kW by the number of hours the lights are on. Multiply by power costs in $/kWh