BS EN 15193:2007

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Calculating energy used for lighting
  4.1 Total energy used for lighting
      4.1.1 Total estimated energy
      4.1.2 Total annual energy used for lighting
  4.2 Lighting Energy Numeric Indicator (LENI)
5 Metering
  5.1 General
  5.2 Load segregation
  5.3 Remote metering
6 Calculation of lighting energy in buildings
  6.1 Installed lighting power
      6.1.1 General
      6.1.2 Luminaire
      6.1.3 Luminaire power (P[i])
      6.1.4 Parasitic powers (P[ci] and P[ei])
  6.2 Calculation methods
      6.2.1 Quick method
      6.2.2 Comprehensive method
      6.2.3 Determination of constant illuminance
            factor F[c]
7 Benchmark of lighting energy requirements
8 Lighting design and practice
Annex A (informative) - Metering of lighting circuit
Annex B (informative) - Measurement method of total
                        power of luminaires and associated
                        parasitic power
      B.1 Introduction
      B.2 Test measurement of luminaire power during
           normal operation
      B.3 Standard test conditions
      B.4 Electrical measuring instruments
      B.5 Test luminaires
      B.6 Test voltage
      B.7 Luminaire power (P[i])
      B.8 Luminaire parasitic power with lamps
           off (P[pi])
      B.9 Emergency lighting luminaire parasitic
           input power (P[ei])
      B.10 Lighting controls standby parasitic
           power (P[ci])
      B.11 Default luminaire power for existing
           lighting installations
      B.12 Default parasitic energy for existing
           lighting installations
Annex C (informative) - Determination of the daylight
                        dependency factor F[D,n]
      C.1 General
      C.2 Building segmentation: Spaces benefiting
           from daylight
      C.3 Daylight supply
           C.3.1 Vertical facades
           C.3.2 Rooflights
      C.4 Daylight dependent artificial lighting
           control, F[D,C]
      C.5 Monthly method
Annex D (informative) - Determination of occupancy
                        dependency factor F[O]
      D.1 Introduction
      D.2 Detailed determination of F[O]
      D.3 Motivation for the choice of FO functions
Annex E (informative) - Determination of the constant
                        illuminance factor F[C]
      E.1 Introduction
      E.2 Power for constant illuminance factor
      E.3 Constant illuminance factor (F[c])
Annex F (informative) - Benchmark values and lighting
                        design criteria
Annex G (informative) - Default values
      G.1 The default values for annual operating
           hours relating to building type are given
           in Table G.1
Annex H (informative) - Other considerations
      H.1 Individual dimming
      H.2 Algorithmic lighting
      H.3 Light pipes
      H.4 Lighting installations with scene setting
      H.5 Daylight guidance
           H.5.1 Vertical facades
           H.5.2 Rooflights
Annex I (informative) - List of Symbols
Bibliography

Describes 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 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.

In this European Standard, the buildings are classified in the following categories: offices, education buildings, hospitals, hotels, restaurants, sports facilities, wholesale and retail services and manufacturing factories.

In some locations outside lighting may be fed with power from the building. This lighting may be used for illumination of the façade, open-air car park lighting, security lighting, garden lighting etc. These lighting systems may consume significant energy and if they are fed from the building, this load will not be included in the Lighting Energy Numeric Indicator or into the values used for heating and cooling load estimate. If metering of the lighting load is employed, these loads may be included in the measured lighting energy.