Patent ID: 7710253

Claim:
An LED warning light comprising: at least one group of LED lamps arranged to collectively produce an illumination pattern having an intensity exceeding predetermined values over a specified angular distribution, said at least one group of LED lamps divided into a plurality of LED banks, each LED bank comprising a plurality of LED lamps connected in series, said LED lamps having a luminance which is a function of a current applied to the LED lamp; a plurality of bank driver circuits, each bank driver circuit operatively connected to deliver current to one of said LED banks, each bank driver circuit sensing current flow through the LED bank to which it is connected and producing a fault output indicating failure of the LED bank, each said bank driver circuit responsive to an input signal to vary the current applied to the LED bank; and a controller operatively configured to receive said fault outputs and provide a first input signal to all said bank driver circuits corresponding to a first current in the absence of a fault output and a second input signal to all said bank driver circuits corresponding to a second current when a fault output is present, wherein said second current is selected to increase the luminance of the LED lamps in the LED banks other than said failed LED bank to compensate for the loss of luminance from the LED lamps in the failed LED bank.