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Calculations 2704

Guide

Calculations

The planning and design of lighting installations involves a number of technical and economical calculations. Usually, these relate to the average lighting level or the exact illuminance at individual points in the room. In addition, it may be useful to determine the luminance levels in specific areas of the room, the quality features of the lighting such as shadow effects and contrast rendition or the cost of a lighting installation including maintenance cost.

Guide

Connected load

Planning based on the number of luminaires and illuminance

Point illuminances

Inverse square law to calculate the illuminance distribution

Utilisation factor method

Estimated calculation of lighting installations

UGR method

Evaluation of the visual comfort: Unified Glare Rating

Maintenance Factor

Taking the reduction of luminous flux into account

Lighting costs

Investment and operating costs of lighting installations