A lamp driver circuit comprising: an inverter circuit to selectively energize one or more fluorescent lamps (106A, 106B), the inverter circuit connected to a direct current voltage bus and configured to convert the DC voltage to an alternating current voltage, the inverter circuit having a transformer to provide the AC voltage to the one or more fluorescent lamps (106A, 106B), the transformer having a primary winding (W 1, W 3) and a secondary winding (W 2) to connect to the one or more fluorescent lamps (106A, 106B); a filter connected to the primary winding (W 1, W 3) to receive a primary winding signal representative of the voltage across the primary winding (W 1, W 3), wherein the primary winding signal has a frequency spectrum and the filter detects a particular characteristic of the frequency spectrum of the primary winding signal, and wherein the particular characteristic of the frequency spectrum is indicative of an end of life condition of the one or more fluorescent lamps (106A, 106B), wherein the particular characteristic of the frequency spectrum of the primary winding signal detected by the filter is a presence of an even harmonic having a magnitude that exceeds a threshold value; a control circuit connected to the inverter circuit and to the filter, wherein the control circuit is configured to discontinue energizing of the one or more fluorescent lamps (106A, 106B) by the inverter circuit when the particular characteristic of the frequency spectrum of the primary winding signal is detected by the filter; and wherein the inverter circuit is adapted to selectively energize a plurality of lamp configurations, wherein each of the plurality of lamp configurations has a particular frequency spectrum that is indicative of an EOL condition for the lamp configuration, and wherein the filter is configured to detect the particular characteristic of each of the particular frequency spectrums for the plurality of lamp configurations. an inverter circuit to selectively energize one or more fluorescent lamps (106A, 106B), the inverter circuit connected to a direct current voltage bus and configured to convert the DC voltage to an alternating current voltage, the inverter circuit having a transformer to provide the AC voltage to the one or more fluorescent lamps (106A, 106B), the transformer having a primary winding (W 1, W 3) and a secondary winding (W 2) to connect to the one or more fluorescent lamps (106A, 106B); a filter connected to the primary winding (W 1, W 3) to receive a primary winding signal representative of the voltage across the primary winding (W 1, W 3), wherein the primary winding signal has a frequency spectrum and the filter detects a particular characteristic of the frequency spectrum of the primary winding signal, and wherein the particular characteristic of the frequency spectrum is indicative of an end of life condition of the one or more fluorescent lamps (106A, 106B), wherein the particular characteristic of the frequency spectrum of the primary winding signal detected by the filter is a presence of an even harmonic having a magnitude that exceeds a threshold value; a control circuit connected to the inverter circuit and to the filter, wherein the control circuit is configured to discontinue energizing of the one or more fluorescent lamps (106A, 106B) by the inverter circuit when the particular characteristic of the frequency spectrum of the primary winding signal is detected by the filter; and wherein the inverter circuit is adapted to selectively energize a plurality of lamp configurations, wherein each of the plurality of lamp configurations has a particular frequency spectrum that is indicative of an EOL condition for the lamp configuration, and wherein the filter is configured to detect the particular characteristic of each of the particular frequency spectrums for the plurality of lamp configurations.