Flash light device i.e. xenon discharge device, for use by dental physician for e.g. gluing of light-curing material in mouth space of children, has focusing device for focusing flash light produced by gas discharge device

The device (105) has a gas discharge device for producing a flash light, and a focusing device for focusing the produced flash light, where the focusing device is formed as a fiber-optic light guide and a reflector device. A filter attachment is provided with a filtering effect in a range between 400 and 410 nm. The focusing device produces voltage in a range from 400 to 500 volts. An attaching device is attached for the flash device on a head of a user. A light-emitting device is provided for curing a light-curing- material and designed as an LED lamp. Independent claims are also included for the following: (1) a method for curing a light-curing- material (2) a device comprising a retention device receiving an amount of light-curing-material. Die Erfindung betrifft eine Blitzlichtvorrichtung mit wenigstens einer Einrichtung zum Erzeugen von Blitzlicht und mit wenigstens einer Einrichtung zum Fokussieren des erzeugten Blitzlichtes. Die Erfindung betrifft ferner Verfahren zu ihrer Nutzung und ein Set mit wenigstens einer erfindungsgemäßen Blitzlichtvorrichtung und einem lichtaushärtbaren Material sowie eine Vorrichtung.