| 摘要 |
The device has a housing (1) with a light outlet part (5) with at least one LED (6) for emitting radiation in the wavelength range of approximately 320 nm. to 550 nm. The housing has a handle (3) with a switch (4). A sensor for measuring the intensity of the light emitted by the LED is connected via an evaluation unit to a display (7) to show when the light intensity of the LED falls below a defined threshold level. The device can be a hand-held device. The semiconducting material of the LED can be gallium nitride, silicon carbide or zinc selenide. |
