Light-emitting module and lens

A light-emitting module comprising:

• a substrate;
• a plurality of light source units, each comprising:
• a light source located on the substrate, and
• a lens on which light emitting from the light source is incident;
• a driver configured to rotate the plurality of light source units in a state in which the substrate and the plurality of light source units are fixed relative to each other;
• and
• a controller configured to control outputs of the plurality of light sources conjunctively with the driver;
• wherein:
• among the lenses of the plurality of light source units, a number of the lenses configured to irradiate light while being on a trajectory in a first irradiation region centered on a rotation axis of the plurality of light source units is less than a number of the lenses configured to irradiate light while being on a trajectory in a second irradiation region centered on the rotation axis;
• the trajectory in the second irradiation region is positioned outward of the trajectory in the first irradiation region
• the plurality of light source units include a central light source unit located on the substrate at the rotation axis, the central light source unit comprising:
• a central light source, and
• a central lens on which light emitted from the central light source is incident, wherein the central lens is configured to irradiate light on a central irradiation region;
• and
• a central axis of light in the trajectory in the first irradiation region is positioned outward of the central irradiation region.