The Lighting Handbook ZG

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Vydal: ZG Lighting Czech Republic s.r.o

Strana 26 z 244







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. The LENI determined accordance with the specifications the 15193 standard (Energy performance buildings Energy requirements for lighting). Formula for calculating lighting installation’s energy consumption LENI [kWh/(m² year)] ∑ (Pn FC) {(tD FD) (tN FO)} A Without elaborating individual parameters greater detail, the following relevant factors are identified: – The installed load (Pn) – Multiplied the annual hours use day (tD) and at night (tN) – Reduced the factors for daylight-based control (FD), presence-based control (FO) and constant lighting control system (FC) (e. The LENI (Lighting Energy Numeric Indicator) stands for the actual energy consumption lighting system kWh per square metre and year.26 The Lighting Handbook Energy efficiency buildings The energy requirement the lighting is also determined when issuing energy performance certificate pursuant the European Energy Performance Buildings Directive.g. maintenance control) – The area assessed (A) LENI also takes charging energy for emergency lighting and standby energy into account