2007-08-11 05:12:40 · 7 answers · asked by butterfli71 2 in Science & Mathematics ➔ Other - Science
A common 60W incandescent bulb burning for 24 hours consumes 720 watt-hours of electricity, or .72 KWH. In the US, a KWH of electricity usually costs between 10-20 cents. At 15 cents that's about 11 cents.
A compact fluorescent lamp producing about the same amount of light would consume only about 12 watts, less by a factor of 5, so it would cost around 2 cents.
2007-08-11 09:09:44 · answer #1 · answered by Frank N 7 · 1⤊ 0⤋
It depends on how big the bulb is (in watts) and how much you pay for a kWh unit of electricity.
A 100W bulb will use a unit of electricity every 10 hours.
A 60W bulb will use a unit every 16.7 hours.
2007-08-11 12:21:31 · answer #2 · answered by lunchtime_browser 7 · 1⤊ 0⤋
About $1.40 for a 60 Watt Bulb
2007-08-11 12:21:35 · answer #3 · answered by Mixed Asian 5 · 1⤊ 1⤋
you can calculate the cost as below:
wattage of bulb x number of hour x cost per unit
example: 100watts bulb for 10 hours and per unit cost is 5 rupees
100 x 10= 1000 watt-hour= 1kwh (1000watt = 1KW)
1kilo watt hour = 1 unit
so cost = 1kwh x Rs 5 = Rs.5
accordingly you can calculate for a month.
2007-08-11 12:29:01 · answer #4 · answered by chandru_mcs 2 · 1⤊ 0⤋
60 watt bulb x 14 cents per Kilowatthour x 24 hours =2 cents
2007-08-11 12:19:15 · answer #5 · answered by Anonymous · 1⤊ 3⤋
Depending on the wattage of the bulb and local cost per kilowatt/hour, I would say 0.15 - 0.25 per day would be reasonable. A CFL would be more like 0.04 - 0.06 per day.
2007-08-11 12:22:39 · answer #6 · answered by gregory_s19 3 · 2⤊ 1⤋
Depending on the wattage, between 2 & 5 cents
(60W)-(100W)
2007-08-12 05:59:01 · answer #7 · answered by Golden Gregory 2 · 0⤊ 1⤋