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From Incandescent Bulbs to Fluorescent and LED Bulbs

TOP/Environment/Eco-Friendly Living
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We will compare the running costs of incandescent bulbs, compact fluorescent lamps, and LED bulbs up to 15 years from now.
The comparison is based on the formula “running cost = lamp cost + electricity cost,” and each lamp is replaced when it reaches the end of its service life.
　Unit Price Lifespan Power Consumption
Incandescent Bulbs
Yen,
[ h,
W ]
Compact fluorescent lamps
Yen,
[ h,
W ]
LED Bulbs
Yen,
[ h,
W ]
Electricity Bills
yen/kWh
Number of units used
Units
Usage Timeh/Day　

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