Harvesting the power of sunlight
The King's University campus is getting smart about using natural resources. Rather than drawing on electricity all day long, new pendant lights have been installed that rely on 'harvested daylight.' Daylight harvesting systems use natural daylight to offset the amount of electric lighting needed to light a room, which reduces overall energy consumption. This is accomplished using lighting control systems that dim or switch electric lighting in response to the changes in daylight.
The pendant lights in the North Academic Building lobby are an example of daylight harvesting on campus. The lights are on a photo sensor that turns the lights off during the day when outdoor lighting is sufficient to light the lobby. The lights are triggered to come back on as it gets dark outside.
Up until recently, the bulbs in the fixtures were 150 Watts each, but they were recently switched for 35 Watt high intensity LEDs. That's a 77% reduction on top of the savings already given by using daylight!