A high flux solar simulator with artificial light, based on elliptic reflectors with xenon short-arc lamps, complement the solar furnace in times of low solar irradiation. Since the high flux solar simulator does not depend on natural solar irradiation, long-term experiments as well as components tests on certification level are possible to carry out under very stable radiant conditions. The emitted shortwave radiation with a radiant power of circa 25 kW is concentrated on a target area at a distance of 3 m. The concentrated energy with a power density up to 4 MW/m2 may be used for ► different applications.