Welcome to Light Trespass.com

This is a site that will drive for change in situations where unwanted light is present.  If you need help, reach out to us we'll do whatever we can to help you!

Light trespass occurs when spill light is cast where it is not wanted. Light trespass is somewhat subjective because it is difficult to define when, where, and how much light is unwanted. An example of light trespass is when spill light from a streetlight or floodlight enters a window and illuminates an indoor area. Examples of light trespass are above and more to come. The light trespass shown would be significantly reduced if a shield were placed on the luminaire.  Proper aiming of the floodlight and shielding would significantly reduce the light trespass shown in this example.