The LENI Lighting Energy Numeric Indicator is calculated in the context of an energy account according to EN 15193. In combination with the indicators for heating, air-conditioning, ventilation and hot-water preparation, it is used for calculating a building's overall energy consumption.
Non-European countries, too, have adopted laws for specifying energy consumption. Australia, for instance, with its Building Code of Australia.
All national standards, regulations and ordinances essentially pursue one shared objective: responsible operation of a lighting installation bearing in mind energy-consumption relevant considerations. To this extent, the calculated actual consumption in kilowatt-hours per square metre per year (LENI) is the common performance indicator.