Patent ID: 8183798

Claim:
A control circuit comprising: a power supply circuit connected to an AC power source, the AC power source supplying AC power to a lighting system comprising a first driver for powering a first light source and a second driver for powering a second light source; a toggle circuit responsive to a power level of the power supply circuit and providing a control output based on the power level; and a switch circuit receiving the control output from the toggle circuit and controlling the supply of the AC power to at least the second driver of the second light source based on the control output of the toggle circuit, wherein: an initial application of the AC power to the power supply circuit causes a first driver to turn ON the first light source; and a first momentary interruption of the applied AC power to the power supply circuit detected by the toggle circuit after the initial application of the AC power causes the switch circuit to supply the AC power to the second driver to turn ON the second light source; the lighting system further comprises a third light source; the switch circuit controls supply of the AC power to the first driver of the first light source and to the second driver of the second light source based on the control output of the toggle circuit; the first momentary interruption of the applied AC power to the power supply circuit detected by the toggle circuit after the initial application of the AC power further causes the switch circuit to cut the supply of the AC power to the first driver to turn OFF the first light source; a second momentary interruption of the applied AC power to the power supply circuit detected by the toggle circuit after the first momentary interruption causes the switch circuit to supply the AC power to the first driver to turn ON the third light source.