A light source, comprising: a cover; a plurality of light emitting modules positioned on the cover; and at least one hook coupled to the cover so as to couple the at least one light emitting module to the cover; wherein each light emitting module comprises: • a substrate comprising: - a body; and - a plurality of branches that extend outward from the body, and have one edge fixed by a plurality of hooks, and the other edge fixed by a plurality of screws, • a plurality of light emitting devices provided on each of the plurality of branches; and • a single connector coupled to the body and electrically connected to each of the light emitting devices of the plurality of branches, wherein on each of the plurality of branches, the light emitting devices are arranged in two or more parallel rows or in a zigzag pattern, wherein the plurality of light emitting modules comprises: at least one first light emitting module having its body positioned at a first end of the cover and its plurality of branches extending toward a second end of the cover opposite the first end; and at least one second light emitting module having its body positioned at the second end of the cover and its plurality of branches extending toward the first end of the cover. a cover; a plurality of light emitting modules positioned on the cover; and at least one hook coupled to the cover so as to couple the at least one light emitting module to the cover; wherein each light emitting module comprises: • a substrate comprising: - a body; and - a plurality of branches that extend outward from the body, and have one edge fixed by a plurality of hooks, and the other edge fixed by a plurality of screws, • a plurality of light emitting devices provided on each of the plurality of branches; and • a single connector coupled to the body and electrically connected to each of the light emitting devices of the plurality of branches, • a substrate comprising: - a body; and - a plurality of branches that extend outward from the body, and have one edge fixed by a plurality of hooks, and the other edge fixed by a plurality of screws, - a body; and - a plurality of branches that extend outward from the body, and have one edge fixed by a plurality of hooks, and the other edge fixed by a plurality of screws, • a plurality of light emitting devices provided on each of the plurality of branches; and • a single connector coupled to the body and electrically connected to each of the light emitting devices of the plurality of branches, wherein on each of the plurality of branches, the light emitting devices are arranged in two or more parallel rows or in a zigzag pattern, wherein the plurality of light emitting modules comprises: at least one first light emitting module having its body positioned at a first end of the cover and its plurality of branches extending toward a second end of the cover opposite the first end; and at least one second light emitting module having its body positioned at the second end of the cover and its plurality of branches extending toward the first end of the cover. at least one first light emitting module having its body positioned at a first end of the cover and its plurality of branches extending toward a second end of the cover opposite the first end; and at least one second light emitting module having its body positioned at the second end of the cover and its plurality of branches extending toward the first end of the cover.