In order to save energy in your home, you may want to think about insulating your loft, attic, and/or roof. Since heat rises, it is important that they are insulated so you do not always need to use the air conditioner on your home. This is usually so simple that you can do it yourself.
This is just a simple, somewhat scientific test of various types and wattages of light bulbs, with some surprising results!
One of the cheapest and easiest ways to make your home more energy efficient is by replacing all of your standard light bulbs with green versions. Not only do such bulbs reduce your energy bill through lower wattage and higher efficiency, but these bulbs are also made to last longer, giving you a two-fold return for your investment.