Artificial lighting is one of the major electricity consumers in typical buildings and consumes about 10% ~ 20% of their total electrical energy.

The artificial lighting strategy at the HPI d-school Building has great potential to reduce energy consumption through its implementation of intelligent lighting control systems in conjunction with the daylighting strategy. This has been achieved through the following aspects:

• Energy efficient LED lighting with a lighting efficiency of less than 1.5 W/m2/100 lux
• Electric lighting which are not over-designed with excessive illuminance levels
• Occupancy and daylight sensors to only switch the lighting when needed
• Dimmable lighting to adjust the light output based on daylight availability
• Wireless and networked-based system architecture which allows to flexible grouping and zoning without any wiring