08324817 is referenced by 66 patents and cites 1077 patents.

An LED-based light tube for use in a conventional fluorescent fixture can feature a housing including a light transmitting portion. At least one electrical connector can be attached to the housing and configured for engagement with the conventional fluorescent fixture. At least one LED can be arranged to produce light in a direction toward the light transmitting portion. A sensor can be operable to detect a brightness level and output a corresponding signal. A controller can be in electrical communication with the at least one electrical connector and operable to control the at least one LED in response to the signal.

Title
Light and light sensor
Application Number
12/572471
Publication Number
8324817 (B2)
Application Date
October 2, 2009
Publication Date
December 4, 2012
Inventor
David L Simon
Grosse Pointe Woods
MI, US
John Ivey
Farmington Hills
MI, US
Agent
Young Basile
Assignee
iLumisys
MI, US
IPC
H05B 37/03
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