The key feature of every watch is that the time can be read at any time under all possible conditions - be it on or under the water, on land or in the air. The energy-independent Luminox-Light-Technology (LLT) guarantees optimal readability at night, up to 25 years, 7 days a week. For most other clocks, luminous paint is used, which has to be charged by a light source and quickly loses its luminosity. Alternatively, a push-button system is available in which the battery-operated lighting is activated with a switch. Luminox, however, uses its own technology that was previously reserved for the military and gives watches an outstanding market position.