Patent ID: 7642501
Filing Date: 2010-01-05
Classification: G01J

Abstract:
1. A method of identifying light, said method comprising: identifying light from an incandescent lamp or a source having a magnetic luminaire ballast via AC signal filtering and a first capacitor voltage generated in response to an amount of light received from the incandescent lamp or the source having a magnetic luminaire ballast unless a second capacitor voltage generated in response to an amount of light received simultaneously from a source having an electronic luminaire ballast is higher; identifying light from a source having an electronic luminaire ballast via AC signal filtering and the second capacitor voltage unless the first capacitor voltage generated in response to an amount of light received simultaneously from an incandescent lamp or a source having a magnetic luminaire ballast is higher; identifying sunlight; powering all said identifyings with a self-contained portable energy source; and performing all said identifyings and said powering in a single housing.