Compact Make

Compact Make

how much electricity (in KW) does it take to make an incandescent light bulb? a compact fluorescent?

DAMNIT, I SAID M A K E. AS IN MANUFACTURE. NOT HOW MUCH ELECTICITY THEY CONSUME. THERE IS A DIFFERENCE.

Compact fluorescent lights are usually available as a range of power levels. The early versions used 25% of the power of incandescent bulbs. But the recent models are roughly equivalent to 20% of the power rating of the standard incandescent bulbs (rating are in Watts — W):

8W compact fluorescent — equivalent to 50W bulb

11W compact fluorescent — equivalent to 60W bulb

15W compact fluorescent — equivalent to 75W bulb

18W compact fluorescent — equivalent to 100W bulb

22W compact fluorescent — equivalent to 110W bulb

Note: 1000W = 1KW

Say if you use an 8W compact fluorescent for 120 hours (about 4 hours a day), you would use:

120 h x 8 W = 960 Wh or 0.96 KWh

If you use an incandescent light bulb, you will need a 40W bulb and the total for 120 hours is:

120 h x 40 W = 4,800 Wh or 4.8 KWh

So, we are looking at 0.96 KWh versus 4.8 KWh, a factor of 5X.

If each KWh costs $0.20 cents, the savings is $0.80. This may not seems much but it will add up to a significant amount once you sum them all up -- the lighting in your home, your city, ... , the whole world. And not forgetting that it is a recurring savings.

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