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Design Sky Illuminance Calculator. For daylighting calculation purposes it may be used with values of zenith luminance or of horizontal illuminance to obtain absolute luminance distributions. The design sky concept when the daylight factor for a given point has been established, it can be converted into an illumination value, if the outdoor illumination is known.
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It is typically expressed in lux (lm/m 2).illuminance levels can be measured with a luxmeter, shown in figure 1.7.2, or predicted through the use of computer simulations with recognised and validated software (e.g. For daylighting calculation purposes it may be used with values of zenith luminance or of horizontal illuminance to obtain absolute luminance distributions. This corresponds to a sky illuminance of around 8500lux.
Sustainability Free FullText Sky Luminance
The calculation procedure allows for pitched roofs with slopes up to 30 degrees from horizontal, and for both clear and overcast sky conditions. It is possible to calculate the fraction of the working plane that has a view of the sky by setting the ambient bounces calculation option to 0 and the illuminance threshold display option to 0, then viewing the floor area above threshold data in the grid output. Direct sunlight is excluded from both values of illuminance. Thus they also represent a.
