A light emitting module (34, 70, 80, 90) comprising: a board comprising a mounting portion, the mounting portion being configured such that a plurality of light emitting devices, each of the light emitting devices having an anode side and a cathode side, is able to be mounted on the mounting portion in an array form; a first interconnecting section comprising a plurality of first interconnections, the first interconnections being configured such that one end of each of the first interconnections is able to be connected to one of the anode side and the cathode side of an associated one of the light emitting devices; a second interconnecting section comprising a plurality of second interconnections, the second interconnections being configured such that one end of each of the second interconnections is able to be connected to the other of the anode side and the cathode side of the associated one of the light emitting devices; and a power supply portion (40, 82, 84) provided along one side of the board and configured to receive an external power, wherein the second interconnecting section further comprises at least one, but less than the number of the second interconnections, collectively interconnecting portion to which another end of each of the second interconnections is connected, and wherein the first interconnecting section and the second interconnecting section are configured such that another end of each of the first interconnections and an end portion (44a1, 44a2) of the collectively interconnecting portion are connected to the power supply portion (40, 82, 84), and configured such that the light emitting devices are able to be divided into a plurality of groups that are independently controllable to be turned on and off, wherein each of the first interconnections is configured to connect an associated terminal of the power supply portion (40, 82, 84) and one or more associated light emitting devices in series, and wherein the first interconnections are arranged in parallel with each other, wherein the power supply portion comprises a second connector connected to the first interconnecting section, and characterized in that the number of collectively interconnecting portions is two, each collectively interconnecting portion comprises a bent portion (44b1), the collectively interconnecting portions are arranged in a bilaterally symmetric manner such that the first interconnecting section is disposed between the collectively interconnecting portions, and an end portion (44a1) of each of the collectively interconnecting portions of the second interconnecting section is connected to a respective first power supply connector. a board comprising a mounting portion, the mounting portion being configured such that a plurality of light emitting devices, each of the light emitting devices having an anode side and a cathode side, is able to be mounted on the mounting portion in an array form; a first interconnecting section comprising a plurality of first interconnections, the first interconnections being configured such that one end of each of the first interconnections is able to be connected to one of the anode side and the cathode side of an associated one of the light emitting devices; a second interconnecting section comprising a plurality of second interconnections, the second interconnections being configured such that one end of each of the second interconnections is able to be connected to the other of the anode side and the cathode side of the associated one of the light emitting devices; and a power supply portion (40, 82, 84) provided along one side of the board and configured to receive an external power, wherein the second interconnecting section further comprises at least one, but less than the number of the second interconnections, collectively interconnecting portion to which another end of each of the second interconnections is connected, and wherein the first interconnecting section and the second interconnecting section are configured such that another end of each of the first interconnections and an end portion (44a1, 44a2) of the collectively interconnecting portion are connected to the power supply portion (40, 82, 84), and configured such that the light emitting devices are able to be divided into a plurality of groups that are independently controllable to be turned on and off, wherein each of the first interconnections is configured to connect an associated terminal of the power supply portion (40, 82, 84) and one or more associated light emitting devices in series, and wherein the first interconnections are arranged in parallel with each other, wherein the power supply portion comprises a second connector connected to the first interconnecting section, and characterized in that the number of collectively interconnecting portions is two, each collectively interconnecting portion comprises a bent portion (44b1), the collectively interconnecting portions are arranged in a bilaterally symmetric manner such that the first interconnecting section is disposed between the collectively interconnecting portions, and an end portion (44a1) of each of the collectively interconnecting portions of the second interconnecting section is connected to a respective first power supply connector.