Illumination device

An illumination device in which a main body is covered with a case unit, the device comprising:

• a light emitting element light source mounted on a substrate on an inner side of the case unit;
• a variable color fluorescent-substance unit having a configuration in which a light emitting color of an applied fluorescent substance differs according to position and being arranged above the light emitting element light source on the inner side of the case unit;
• and
• a toning adjusting unit mechanically coupled with the variable color fluorescent-substance unit, wherein
• the variable color fluorescent-substance unit comprises a circular plate shaped gear with external teeth, and is configured to rotate on a fixing shaft provided at a center portion in a clockwise direction or a counterclockwise direction,
• the toning adjusting unit comprises a circular ring-shaped gear with internal teeth which couples to an outer periphery of the case unit and is rotatable in the clockwise direction or the counterclockwise direction,
• the variable color fluorescent-substance unit is arranged such that the external teeth mesh with the internal teeth of the toning adjusting unit, and
• a relative positional relationship between a color distribution of the fluorescent substance applied on the variable color fluorescent-substance unit and the light emitting element light source is changed when the toning adjusting unit is rotated to rotate the variable color fluorescent-substance unit.