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Information Sh�et 159 (Qctober 1999) http://www.darksky.org/resources/information-sheets/is159.htm1 <br /> 10/99 <br /> International Dark-Sky Association -- Information Sheet 159 <br /> Shielding Floodlights <br /> Improving Performance to Prevent Glare, Light Trespass, and Light Pollution <br /> Outdoor floodlights are designed to "broadcast" illumination, to cover as much area as possible. <br /> The lack of"light control" in a floodlight causes many detrimental and unwanted side-effects, like: <br /> blinding glare, intrusion into neighboring homes and natural areas - called light trespass, and <br /> waste light up into the night sky - called light pollution . <br /> d Waste Light,Light Trespass <br /> 0 <br /> � <br /> 0 <br /> � <br /> � I Of <br /> .� <br /> n Task Areo Z <br /> ZY <br /> � ,_ <br /> _ _ <br /> � _ � <br /> � ----•-'� r -•-- <br /> � ... ... <br /> �__ ._____- �,.,� <br /> I �/ \ Too <br /> The floodlight's exposed light source (bulb) remains in direct view from most angles -which <br /> causes disabling glare. This compromises vision for pedestrians, drivers, or police surveillance. <br /> It also disturbs neighbors, disrupts nearby wildlife, and can be visible across great distances. <br /> A three-sides shield can be installed on the floodlight to create a horizontal visor as shown. The <br /> visor should just cover the light source completely. This incorporates a "light control" feature to <br /> the fixture, allowing more precise and efficient lighting for the task area. <br /> By shielding the distracting glare from the light source, the viewer can actually see the entire area <br /> better. The light can be contained within the property area, and kept out of adjacent properties. <br /> The light normally lost up into space is now redirected to the intended task area. <br /> Some manufacturers of floodlights offer attachable visor shields. They can also easily be made <br /> from flashing aluminum or stainless steel sheet metal. Once the shields are installed, <br /> floodlights can be re-aimed at night to properly "tune" the illumination to the property boundary<as <br /> shown below. Another added benefit from shielding floodlight glare is that it creates a more <br /> 1 of 2 11/28/2007 9:14 AM <br />