This European Standard specifies the calculation methodology for the evaluation of the amount of
energy used for indoor lighting inside the building and provides a numeric indicator for lighting energy
requirements used for certification purposes. This European Standard can be used for existing
buildings and for the design of new or renovated buildings. It also provides reference schemes to
base the targets for energy allocated for lighting usage. This European Standard also provides a
methodology for the calculation of instantaneous lighting energy use for the estimation of the total
energy performance of the building. Parasitic powers not included in the luminaire are excluded.