The incandescent wattage and power output was correlated fairly well, but the LED wattage is not necessarily power. In LED's you want to look for a high Lumen count.
An incandescent light bulb will only cost you about $1.50 but you'll end up spending more money keeping an incandescent light going than what the light is actually worth.
An LED overtime is much more energy efficient, it will last up to 22 years, and save you more money in the long run.
Home Depot store manager Mark Rowland says before you place energy efficient appliances in the home, check to see where the majority of your money is going. "When it comes to bigger energy efficient appliances like refrigerators, commodes, and sinks you want to look for the "Energy Star" logo or the "Water Sense" logo. These guarantee the you will save at least 25% off on energy."
Rowland says there's also a way to save at least 5,000 gallons of water each year by switching commodes. "Prior to 1994, before regulations were put in place, there were 3 to 5 gallon per flush toilets and they're still out there. But for folks who want to save a lot of money there are a complete line of toilets that are under a gallon per flush."
Remember in order to save money in the long run, you will have to spend a little to get started on an energy efficient home.