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The Consumer Intelligence Test. Saving the Earth via Choice of Light Bulb. The Evil Incandescent Bulb. 100 Watts 1000 hour Lifetime Initial cost = 0.75$ Energy Cost = 10 cents per KWH Energy usage over lifetime = 100 Watts x 1000 hours = 100 KWH
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The Consumer Intelligence Test Saving the Earth via Choice of Light Bulb
The Evil Incandescent Bulb • 100 Watts • 1000 hour Lifetime • Initial cost = 0.75$ • Energy Cost = 10 cents per KWH • Energy usage over lifetime = 100 Watts x 1000 hours = 100 KWH • Total Cost of Ownership = 0.75 + 0.1$ x 100 = $10.75
1000 Hours Later • Get in your Internal Combustion Vehicle and drive back to the light bulb store to get another
The Consumer Paradox • Communist Fluorescent Bulb • 10,000 hour lifetime • 20 Watts for same Luminosity • $5.00 initial cost (now cheaper in many stores) • What, 5 bucks for a friggin’ light bulb, besides it looks funny (e.g. it’s a communist plot)
Thinking it through • Total energy used over lifetime = 10,000 hours x 20 watts = 200 KWH • Total cost = $5 + 200KWH x .1$ = 25$ • The equivalent cost of buying 10 incands (not counting gas) is 10 x 10.75 = $107.50
So What the Hell are you Doing? • If you had plunked down 5 bucks to begin with you would have saved $82.50 over this 10,000 hour period (about 3 years) and this is just for one light bulb! • Multiply this by 20 light bulbs per house and you save $1600 plus 16000 KWHs of energy. • Like, Duh
