Patent ID: 6969955

Claim:
An apparatus for providing dimming control of an electronic ballast circuit comprising: a plurality of input voltage terminals that can receive alternating current; a plurality of fluorescent lamp terminals; an electronic ballast circuit, wherein the electronic ballast circuit is electrically connected to the plurality of input voltage terminals that can receive alternating current and the electronic ballast circuit is electrically connected to the plurality of fluorescent lamp terminals; at least one light sensor that is electrically connected to the electronic ballast circuit so that electrical power applied at the plurality of fluorescent lamp terminals can be proportionally modified in relationship to the ambient light received by the at least one light sensor; and a plurality of switches that are electrically connected in one-to-one corresponding relationship to a plurality of resistive loads, wherein the plurality of switches and the plurality of resistive loads are electrically connected to the electronic ballast circuit so that the electrical power applied at the plurality of fluorescent lamp terminals can be set at a plurality of predetermined lighting levels.