This device measures light intensity of flashes of light as short as 5µs. With the “black box” the components responsible for light efficiency and light distribution can be designed and selected, based on objective measuring data. For LED stroboscopes, the measuring unit provides data for the selection and arrangement of the LED’s and the design of the lenses. Every RHEINTACHO stroboscope is checked and released on this test rig. For some of the portable stroboscopes, a test certificate is supplied with the device.