Patent ID: 8183794

Claim:
A sign comprising: signage housing having a sign cavity therein; a plurality of LED modules disposed within the sign cavity, wherein each of the LED modules is electrically coupled to power a distribution circuit and comprises: at least one LED intended for operation within a normal temperature range; a driver circuit coupled to the at least one LED for supplying current thereto; a control circuit coupled to the driver for regulating the current from the driver to the at least one LED; and a temperature sensor coupled to the control circuit for furnishing a temperature signal to the control circuit indicative of ambient temperature about the LED; wherein the control circuit is responsive to the temperature signal for reducing or cutting off current from the driver circuit to the LED when the ambient temperature exceeds the normal temperature range; wherein a first one of the LED modules comprises a first LED having a first normal operating temperature range and a first cutoff temperature; and a second one of the LED modules comprises a second LED having a second normal operating temperature range different than the first normal operating temperature range, and a second cutoff temperature different than the first cutoff temperature.