Osram Sylvania figures that putting its $39.98 LED in to replace a 60-watt incandescent will save $132 over the life of the bulb, assuming a price of electricity at 10 cents per kilowatt-hour.

When I tried it at home, the 75-watt equivalent, called the 17-watt A21 LED, was too long to fit into a small overhead fixture. You will need to learn some lighting lingo.