5.1 By Time Of Day
In daylit areas, energy consumption can be reduced by reducing the electric lighting in response to the availability of sufficient daylight. This can be done through dimming or switching. The diagram below shows the illumination level during the course of a typical day for a daylighting application. Throughout the day, the electric lights are dimmed to maintain a near constant interior light level.
Energy savings realized will depend on:
Activities within the building
Building form, orientation and design
Control design and installation