Daylight factor is a measure of how well your building admit daylight to its interior. It is expressed as the percentage of light level of a particular point inside your building over the light level outside under unobstructed overcast sky.
Acceptable values for a good design is between 1% to 3%. anything below this is considered underlit and would require the assisstance of artificial lighting for task like reading. Have it over 5% and you run the risk of having glare or even heat problem.
The photo below is an example of a daylighting strategy we did for an office building. By jacking up the roof for the central open office space, a horizontal band of 450mm window strip were able to provide the interior an average distribution of daylight factor of 2.5%.
Note that the internal partition of the adjacent rooms are of full height clear glass, and from the this space one can have direct view towards outside. This also helps in promoting good daylight factor. The fact that the furnishings and wall color are white further enhance the daylight dsitribution,
Acceptable values for a good design is between 1% to 3%. anything below this is considered underlit and would require the assisstance of artificial lighting for task like reading. Have it over 5% and you run the risk of having glare or even heat problem.
The photo below is an example of a daylighting strategy we did for an office building. By jacking up the roof for the central open office space, a horizontal band of 450mm window strip were able to provide the interior an average distribution of daylight factor of 2.5%.
Note that the internal partition of the adjacent rooms are of full height clear glass, and from the this space one can have direct view towards outside. This also helps in promoting good daylight factor. The fact that the furnishings and wall color are white further enhance the daylight dsitribution,