Daylight Zones: Toplighted Spaces

When designing an energy-saving daylight harvesting control system, a critical decision is to establish lighting control zones, identifying lighting loads to be separately controlled. Before this decision can be made, however, we must first determine the daylight zones. A daylight zone is defined by the ASHRAE/IES 90.1-2010 energy standard as “the floor area substantially illuminated by daylight.”

In this special report by the Lighting Controls Association, we will examine methods of establishing daylight zones in toplighted spaces.

Click here to read this special report by Craig DiLouie, LC.

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The leading source of lighting controls education for more than 10 years, the Lighting Controls Association is a non-profit organization administered by the National Electrical Manufacturers Association with the mission of educating the professional lighting community about lighting control and controllable ballast technology and application. Members include Cooper Controls, DELTA Controls, Encelium Technologies, GE Lighting, Hubbell Building Automation, HUNT Dimming, Leviton, Lightronics, Lutron Electronics, OSRAM SYLVANIA, Philips Lighting Electronics, PLC-Multipoint, Schneider Electric, Sensor Switch, Synergy Lighting Controls, Tridonic, Universal Lighting Technologies and WattStopper.

Good lighting design includes a good controls design.