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light energy numeric indicator (LENI)

Light Energy Numeric Indicator (LENI) is a reference value for lighting efficiency. This value is calculated from the quotient of the energy consumption for lighting

to the square metres related to the year. The calculation procedure is described in the European standardEN 15193 for the "Energy Rating of Buildings". The LENI value increases with the energy efficiency of the lighting, its time-of-day-dependent control and the control by occupancy sensors. On the other hand, excessively long lighting times, high charging energies for emergency lighting and lighting times during daylight have a negative effect.

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Englisch: light energy numeric indicator - LENI
Updated at: 12.05.2016
#Words: 58
Translations: DE