$100 investment will make you $500 to $1,500 in 5 years.

New figures on CF bulbs over the old tungsten heater.  March off to Home Depot, I'm told they all have a display of 100 watt tungsten incandescent next to a 26 watt CF, same lumens, theres a switch, both are instant on, CF lasts 5,000 hours, compared to 600 on the old bulb.
Depending on where you live and the hours of use, for every $100 worth of CF's you buy, over the next 5 years you save/keep from $100 to $300 dollars annually in electric expense.  (figures included the difference in purchase price)  To hell with the electric company, daddy needs a new pair of shoes.  Bonus, keeps you off ladders and chairs changing lights so often.  Put them where ever you use the lights at least an hour a day.

Home Depot recycles them for you if they fizzle.  I have 2 that are a good 12 years old.  I also have one fixture where they last only about a year, the old style bulbs lasted there only 2 or 3 months at a whack, I suspect this location is not getting clean power.

I read a few days ago, this guy says we can save 2k to 5k a year with energy saving devices, low use appliances, and awareness of waste.  With the income of many Americans falling, this is going to be the way you you can still maintain the same lifestyle, keep money from the utility company so you can spend it at the pub.

This savings is guaranteed.  The bank doesn't pay that much interest and the stock market isn't a sure deal.