# How much does it cost to light two 100 watt bulbs for five hours a night for 30 days?

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• 1 month ago

whatever you pay for 30 kilowatts.

• JetDoc
Lv 7
1 month ago

That would depend on what your local electric utility company charges for power.

• Dimo
Lv 5
1 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

• 1 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.

• Scott
Lv 6
1 month ago

It depends on what your electric utility charges per kilowatt hour.

• Dan
Lv 4
1 month ago

About \$3.50 - depending where you live. If you used LED equivalent bulbs the cost would be about 35 cents.