A redundant light sensing system comprising: a plurality of sensor devices each comprising a light source and at least one light sensor and arranged as a first plurality of sensor devices and a second plurality of sensor devices; at least one controller configured to activate a circuit protection device; and at least one hub communicatively coupled to said plurality of sensor devices and to said at least one controller, said at least one hub configured to: receive a sensor status signal from said at least one light sensor of each of said plurality of sensor devices in response to a test pulse emitted by the light source; transmit a hub status signal to said at least one controller, wherein the hub status signal is based at least in part on the sensor status signal; receive an arc flash detection signal from one of said plurality of sensor devices; transmit the arc flash detection signal to said at least one controller for use in activating the circuit protection device; characterized in that said at least one hub comprises a first hub and a paired second hub, said first hub communicatively coupled to the first plurality of sensor devices and said second hub communicatively coupled to the second plurality of sensor devices; and in that said first hub transmits the hub status from said first hub to said second hub. a plurality of sensor devices each comprising a light source and at least one light sensor and arranged as a first plurality of sensor devices and a second plurality of sensor devices; at least one controller configured to activate a circuit protection device; and at least one hub communicatively coupled to said plurality of sensor devices and to said at least one controller, said at least one hub configured to: receive a sensor status signal from said at least one light sensor of each of said plurality of sensor devices in response to a test pulse emitted by the light source; transmit a hub status signal to said at least one controller, wherein the hub status signal is based at least in part on the sensor status signal; receive an arc flash detection signal from one of said plurality of sensor devices; transmit the arc flash detection signal to said at least one controller for use in activating the circuit protection device; characterized in that said at least one hub comprises a first hub and a paired second hub, said first hub communicatively coupled to the first plurality of sensor devices and said second hub communicatively coupled to the second plurality of sensor devices; and in that said first hub transmits the hub status from said first hub to said second hub. receive a sensor status signal from said at least one light sensor of each of said plurality of sensor devices in response to a test pulse emitted by the light source; transmit a hub status signal to said at least one controller, wherein the hub status signal is based at least in part on the sensor status signal; receive an arc flash detection signal from one of said plurality of sensor devices; transmit the arc flash detection signal to said at least one controller for use in activating the circuit protection device; characterized in that said at least one hub comprises a first hub and a paired second hub, said first hub communicatively coupled to the first plurality of sensor devices and said second hub communicatively coupled to the second plurality of sensor devices; and in that said first hub transmits the hub status from said first hub to said second hub.