What's that light cost you?

  1. Select your electric rate (or click to enter your own)
  2. You can calculate results for up to four types of lights. For each:
    1. Select the type of lamp (i.e. Incandescant, Fluorescent, etc.)
    2. Select the lamp wattage (lamp lumens)
    3. Enter the number of lights in use
    4. Select how long the lamps are in use (or click to enter your own; enter hours on per year).
  3. Finally, click Submit.


The Dark Sky Society (DSS) is based on Long Island, NY. Membership is free and open to anyone interested in preserving the natural star-filled night sky and fighting the intrusion of light pollution.

site design and hosting by skypanther studios