Device for controlling a radiation source for hardening lining tubes

A device for curing resin-impregnated lining tubes with high-energy radiation, comprising at least one radiation source for generating high-energy radiation and at least one power control device for regulating the electrical power output to the at least one radiation source, wherein at least one setpoint parameter representative of the desired electrical power consumption by the radiation source is settable or set at the power control device, and the actual power consumed by the at least one radiation source is measured by a measuring device and is permanently compared with the setpoint parameter, wherein, in the case where the setpoint parameter is undershot, the power control device increases the power output and, in the case where the setpoint parameter is exceeded, the power output is reduced, and wherein the actual power output of the power control device can deviate from the predefined setpoint parameter, such that the actual power of the radiation source corresponds to the setpoint parameter.