A light emitting module, comprising: a body, the body being divided into a first quadrant to a fourth quadrant; a plurality of light emitting devices (D11∼D14, D21∼D24) disposed in the first to fourth quadrants of the body; and a turn-on controller configured to control turn-on of the plurality of light emitting devices, increasing the number of ones of the light emitting devices (D11∼D14, D21∼D24) to be turned on as the level of ripple increases within a phase range, wherein distances between the neighboring light emitting devices correspond to angular distances between centers of the neighboring light emitting devices in a plan view, wherein an uniformity ratio of illuminance of the light emitting module is improved by determining the distances between neighboring light emitting devices of the plurality of light emitting devices (D11∼D14, D21∼D24) disposed in the first to fourth quadrants as following: the distances (θ2, θ3, θ4) between neighboring light emitting devices (D11∼D14) disposed in the first and second quadrants are different from each other in consideration of power consumption deviation, the distances (θ6) between neighboring light emitting devices (D21∼D24) disposed in the third and fourth quadrants are different from each other in consideration of power consumption deviation, the distance (θ5) between neighboring light emitting devices (D14, D24) respectively disposed in the first and fourth quadrants is different from the distances (θ2, θ3, θ4) between the neighboring light emitting devices (D11∼D14) disposed in the first and second quadrants, the distance (θ1) between neighboring light emitting devices (D11, D21) respectively disposed in the second and third quadrants is different from the distances (θ2, θ3, θ4) between the neighboring light emitting devices (D11∼D14) disposed in the first and second quadrants, wherein the uniformity ratio of illuminance is calculated as following equation, and Max − Min Max × Min × 100 wherein Max is a maximum value among average illuminance values of the first quadrant to the fourth quadrant, and Min is the minimum value among the average illuminance values of the first quadrant to the fourth quadrant. a body, the body being divided into a first quadrant to a fourth quadrant; a plurality of light emitting devices (D11∼D14, D21∼D24) disposed in the first to fourth quadrants of the body; and a turn-on controller configured to control turn-on of the plurality of light emitting devices, increasing the number of ones of the light emitting devices (D11∼D14, D21∼D24) to be turned on as the level of ripple increases within a phase range, wherein distances between the neighboring light emitting devices correspond to angular distances between centers of the neighboring light emitting devices in a plan view, wherein an uniformity ratio of illuminance of the light emitting module is improved by determining the distances between neighboring light emitting devices of the plurality of light emitting devices (D11∼D14, D21∼D24) disposed in the first to fourth quadrants as following: the distances (θ2, θ3, θ4) between neighboring light emitting devices (D11∼D14) disposed in the first and second quadrants are different from each other in consideration of power consumption deviation, the distances (θ6) between neighboring light emitting devices (D21∼D24) disposed in the third and fourth quadrants are different from each other in consideration of power consumption deviation, the distance (θ5) between neighboring light emitting devices (D14, D24) respectively disposed in the first and fourth quadrants is different from the distances (θ2, θ3, θ4) between the neighboring light emitting devices (D11∼D14) disposed in the first and second quadrants, the distance (θ1) between neighboring light emitting devices (D11, D21) respectively disposed in the second and third quadrants is different from the distances (θ2, θ3, θ4) between the neighboring light emitting devices (D11∼D14) disposed in the first and second quadrants, wherein the uniformity ratio of illuminance is calculated as following equation, and Max − Min Max × Min × 100 wherein Max is a maximum value among average illuminance values of the first quadrant to the fourth quadrant, and Min is the minimum value among the average illuminance values of the first quadrant to the fourth quadrant.