ABSTRACT
In order to take full advantage of the energy saving potential obtainable from daylight, it is essential to provide the building with control systems capable of adjusting electric light output to the available daylight. If such a system is not provided, electric lights will tend to stay on, as can be seen in many office buildings. Frequently the artificial lighting system is switched on in the morning and off in the evening, regardless of available daylight. This is particularly the case in open plan spaces where there is a central switch. In cellular building designs the occupant is more in control of and feels responsible for light switching, resulting in an improved lighting performance.
