How much energy can be saved by lighting control on demand?
In the average office building a third of the power consumed is for lighting. People are always forgetting to turn off lights during the day. Lights are left on in many corridors and staircases, even outside of business hours. In banks and insurance corporations the average power consumption per head is more than 5000 kWh. That is more than in most households. There is major potential for saving of 500 kWh per year and worker if lights were left on all day until now. 350 kWh per year in a 10-meter-long corridor with windows if light is only turned on when needed (communicating routes and siderooms occupy 30% of the area in office buildings). 250 kWh per year in a toilet room if lights are only turned on during someone’s presence. By using the right kinds of light and intelligent light control, it is possible to both enhance personal comfort and convenience and to cut energy consumption. Halogen lamps produce about twice as much as light as conventional filament lamps for the same elect
