Method for operating an illuminating device

An illuminating device comprising

• a pump radiation source for emitting pump radiation,
• a phosphor wheel, on which a first phosphor for emitting first conversion light and a second phosphor for emitting second conversion light are provided, and
• a control unit for controlling the pump radiation source,
• wherein the first and the second phosphor are arranged in a manner spatially separated from one another on the phosphor wheel,
• and wherein a first useful light based on the first conversion light and a second useful light based on the second conversion light have the same color, but a different color locus in the CIE standard colorimetric system,
• and wherein the control unit is furthermore configured for a method in which the phosphor wheel rotates about a rotation axis and in the process is irradiated with the pump radiation in an irradiation region eccentrically with respect to the rotation axis in such a way that a circular track is irradiated owing to the rotation of the phosphor wheel,
• wherein during a 360° revolution of the phosphor wheel the first phosphor is irradiated with a first pump radiation power and the second phosphor is irradiated with a second pump radiation power, which is different than the first pump radiation power.