Patent ID: 9472108
Filing Date: 2016-10-18
CPC Classification: B64D,B64F,F21V,F21W,F21Y,G08G,H05B,Y02B

Claim Text:
1. A method of updating an airfield lighting system, comprising: removing a light source from an existing light fixture of an airfield lighting system, wherein the removed light source is not a light emitting diode (LED) light source; replacing the removed light source with an LED light source in the existing light fixture without modifying or replacing any other element of the existing light fixture, wherein the LED light source includes a plurality of active LEDs; and adding a controller for the LED light source to the existing light fixture, wherein the controller is configured to maintain, upon a failure of one or more of the plurality of active LEDs of the LED light source, a same luminosity emitted by the LED light source as before the failure by increasing a luminous power already being emitted by the other active LEDs of the LED light source that have not failed, and wherein the existing light fixture includes an optical assembly configured to distribute light emitted by the LED light source into a same photometric pattern as before the light source was removed from the existing light fixture and replaced with the LED light source.