Provided are an illumination device, a control device, and a control method capable of uniformly controlling outputs of a plurality of light sources with a more simplified temperature control circuit. For comparison between a plurality of light sources, a plurality of cooling units provided for each of the light sources, and cooling each of the light sources, a target temperature of each of the light sources, and a measured temperature of each of the light sources or the environment. And a drive control unit that switches control to each of the light sources.【課題】より簡略化された温度制御回路にて複数の光源の出力を一定に制御可能な照明装置、制御装置、および制御方法を提供する。【解決手段】複数の光源と、前記光源ごとに設けられ、前記光源をそれぞれ冷却する複数の冷却部と、前記光源の各々の目標温度と、前記光源の各々または環境の測定温度との比較に基づいて、前記光源の各々への制御を切り替える駆動制御部と、を備える、照明装置。
