- The Washington DC Metro Area Wastes
41.8 million kilowatt hours of electricity with bad lighting every
- California wastes 33,336,000 kWh/year
six valley cities (metropolitan areas)!
- A typical streetlight uses a 400 watt
metal halide bulb. If the streetlight were replaced with a
dark skies compatible "cutoff fixture" which directs light
downward instead of light shining upwards and sideways, a 250 watt
metal halide bulb would produce approximately the same light on the
street, but it would cost less! The municipality would save an
estimated $52.80 per year for that light. A municipality that
has 10,000 fixtures could save approximately $528,000 per year
in electrical costs, and would reap the benefits of significantly
reduced light pollution as well.
- Homeowners and businesses can also
reap proportional savings by installing and replacing inefficient,
pollution generating fixtures, with dark sky compatible lights.