LED

LED is the acronym for “light-emitting diode”. They are semiconductor devices that have the same electrical properties as a diode. If the electrical current flows through the diode in a forward direction, the light, infrared radiation or ultraviolet radiation will be emitted with a wavelength dependent on the semiconductor material and doping.

Lifetime

Unfortunately, it is not possible to test how long each product will last. Therefore, the indicated lifetime is the average lifetime. For LEDs, the average lifetime is the time from which the lamp is switched on for the first time to the point when only 50% of the tested lamps are still functioning flawlessly.

Luminous efficiency

Luminous efficiency (lumens per watt) refers to the efficiency of lamps. The more light (lumens) produced per the energy/power (watts) consumed, the lower the costs and the higher the efficiency.

Luminous flux

Lumen (lm) is the unit of measurement for luminous flux. It indicates the brightness of light that is output in various directions by a light source and rated in accordance with the internationally stipulated sensitivity of the human eye.