Abstract: A hydromechanical energy storage and energy conversion device includes a water reservoir, a float which is arranged in the water reservoir, a generator, an energy transmission apparatus, and a fixing device. The float can be lifted with a rising water level in the water resevoir from a lower position into an upper position. The first floar can be fixed in the upper position. The genrator converts a kinetic energy into an electrical energy. The energy transmission apparatus connects the float to the generator and transmits the kinetic energy between the float and the generator. The fixing devoce secures the float in the upper position.

Abstract: In a circuit arrangement for operating a lamp, an impulse generator for generating series of impulses having a frequency of more than 10 Hz is provided and is connected to a voltage source and to the lamp for operating the lamp with the series of pulses so as to generate bright light pulses at a frequency of at least 10 Hz.