Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
John Alfred Ayres0
Date of Patent
August 7, 2007
0Patent Application Number
109357690
Date Filed
September 8, 2004
0Patent Primary Examiner
Patent abstract
A secondary light assembly emits light into an area lit by a primary light source. The secondary light assembly includes a light sensor for sensing light emitted from the primary light source. A secondary light source is operatively connected to the light sensor. A controller is electrically connected to the light sensor and the secondary light source. The controller calculates a rate of change of light emission from the primary light source such that the controller turns the secondary light source on when the rate of change of light emission from the primary light source is above a predetermined rate threshold.
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