Patent ID: 7587289

Claim:
A sensor and light fixture powered by a data cable, comprising: a housing defining a hollow interior body and defining an opening through which the data cable passes into the fixture, wherein the housing includes an exterior flange positioned to contact an exterior surface of a generally planar wallboard when the fixture is installed into an aperture within the wallboard, and includes a plurality of flexible barbed members that include surfaces that are spaced away from the exterior flange for engaging the wallboard between the barbed members and the exterior flange, wherein the barbed members are for contacting an interior surface of the wallboard when the fixture is installed, wherein the interior surface is generally parallel to the exterior surface; a circuit board that includes a data cable receptacle for connecting to the data cable, and that includes a plurality of first contacts for electrically coupling to at least a portion of the data cable; an LED cartridge including a plurality of second contacts arranged in a concentric configuration, wherein the second contacts are individually ring-shaped, with respective second contacts for physically contacting corresponding first contacts; and a power circuit receiving input power delivered via the data cable and producing a sensor voltage from the input power; wherein the LED cartridge incorporates a sensor that is powered by the sensor voltage, wherein the LED cartridge includes a plurality of LEDs that are responsive to the sensor, wherein the LED cartridge has a network address for enabling communications through the power circuit between the LED cartridge and at least one LED cartridge and a computer; and a locking ring for engaging the exterior flange to secure the circuit board and the LED cartridge within the hollow interior body.