1–32 Light Source Comparison Today people have three competing light sources for home use.

This problem asks you to determine the trade-offs between the costs of the three types of lights. In this example, all three emit the same amount of light (lumens). The following table shows the salient properties of each lamp. Over the lifetime of one light-emitting diode (LED) lamp, how much cost savings is there by using the LED lamp over the traditional incandescent bulb and over the compact fluorescent lamp (CFL) if electricity costs 10 ¢=kWh?

BULB TYPE Incandescent COST PER LAMP POWER USED AVERAGE LIFETIME $1.00 100 W 1500 hours CFL $3.00 16 W 6000 hours LED $12.00 2 W 50,000 hours