An emergency lighting device comprising: a first group of solid state emitters connected in a first string and configured to emit light of a first color, the first group of solid state emitters having an input end and an output end ; a second group of solid state emitters connected in a second string and configured to emit light of a second color, the second group of solid state emitters having an input end and an output end , wherein the input end of the second group of solid state emitters is electrically connected in series to the output end of the first group of solid state emitters; wherein the first group of solid state emitters is configured to receive a normal operation current from an LED driver at the input end of the first group of solid state emitters, and the second group of solid state emitters is configured to output the normal operation current to the LED driver at the output end of the second group of solid state emitters; and wherein the first group of solid state emitters is configured to receive an emergency operation current from an emergency LED driver at an emergency input that is different from the input end of the first group of solid state emitters and output the emergency operation current at an emergency output , wherein the emergency input and the emergency output are located between the input end of the first group of solid state emitters and the output end of the second group of solid state emitters such that the emergency operation current is supplied to a first plurality of the first group of solid state emitters and not to a second plurality of the first group of solid state emitters. a first group of solid state emitters connected in a first string and configured to emit light of a first color, the first group of solid state emitters having an input end and an output end ; a second group of solid state emitters connected in a second string and configured to emit light of a second color, the second group of solid state emitters having an input end and an output end , wherein the input end of the second group of solid state emitters is electrically connected in series to the output end of the first group of solid state emitters; wherein the first group of solid state emitters is configured to receive a normal operation current from an LED driver at the input end of the first group of solid state emitters, and the second group of solid state emitters is configured to output the normal operation current to the LED driver at the output end of the second group of solid state emitters; and wherein the first group of solid state emitters is configured to receive an emergency operation current from an emergency LED driver at an emergency input that is different from the input end of the first group of solid state emitters and output the emergency operation current at an emergency output , wherein the emergency input and the emergency output are located between the input end of the first group of solid state emitters and the output end of the second group of solid state emitters such that the emergency operation current is supplied to a first plurality of the first group of solid state emitters and not to a second plurality of the first group of solid state emitters. <EOS>