What makes a fixture earn the Energy Star Approval? Will I really save money if I replace my old light fixtures?  Well let's answer the question about saving money, if you replaced 5 of your most frequently used light fixtures you would save approximately $65 a year in energy cost.    Not only would you save money but you would emit less greenhouse gas. If every home in America replaced 5 of their light fixtures with energy star light fixtures, collectively we could prevent greenhouse gases equivalent to 10 million cars.  More...