Statistics
Lighting
Lighting represents approximately 22% of all electricity consumed in commercial office buildings. Thus, lighting is a major portion of total building operating costs. Retrofits to lighting systems can yield savings as high as 40% of current costs and can easily be fit into routine building maintenance.

Lighting
If every American home replaced just one incandescent light bulb with an ENERGY STAR qualified CFL, we would save enough energy to light more than 3 million homes for a year, more than $600 million in annual energy costs and prevent greenhouse gases equivalent to the emissions of more than 800,000 cars.
Source: http://www.energystar.gov/index.cfm?c=cfls.pr_cfls
Of the 1.5 billion fluorescent lamps installed in the U.S. commercial sector, 58% are still T12s. This is a missed opportunity. Typically, lighting retrofits recoup costs quickly and are an excellent low-risk investment. Click here to see lighting projects.