Sydney School of Architecture,Design,and Planning
The scientific basis for the provision of sufficient light for seeing is at least 80 years old. It was developed before calculators and computers. It served us well, but it has helped us too long — at least 30 or 40 years too long. Unfortunately, it is enshrined in standards and lighting design software.
So, what is the new scientific insight? It is the achievement of an average uniform illuminance on a horizontal plane. There are now guidelines to think of lighting design in terms of the volume being lighted — in terms of the luminance (brightnesses) needed to achieve excellent and enjoyable seeing conditions. The ways and means will be explored.