CFL's have become more popular in recent years but do they make financial sense? Suppose a typical 60 watt light bulb cost $0.44 and last for 1,000 hours. A 15 watt CFL which provides the same light costs $3.35 and lasts 12,000 hours. A kilowatt hour of electricity costs $0.12 national average. You require a retuen or 9% and use a light fixture 500 hours per year. What is the breakeven cost per killowatt hour?