L4. Install Lighting Controls in Common Areas

Description

In many developments, lights in common areas are left on regardless of whether they need to be, some staying on 24 hours a day. In some community areas and offices with windows, light from the outside can make full fluorescent lighting unnecessary for much of the day. In both cases, lighting controls can save energy by controlling the operation of fluorescent lights according to how much light is actually needed.

Applicability

• Multifamily buildings with fluorescent lighting
• Buildings where lights are not routinely turned off when not in use

Types

• Occupancy controls
• Daylighting controls

Considerations

• This ECM should be considered in conjunction with other lighting options.
• When daylighting controls are installed, light sensors must be properly placed and calibrated.
• Design and installation of lighting controls should be performed by an experienced professional.
• Infrared occupancy sensors should not be installed in restrooms with partitions or in large enclosed spaces where the area may exceed sensor capacity.
• Ultrasonic occupancy sensors should not be installed closer than 6 to 8 feet from an air vent, more than 14 feet from the floor, or in rooms where the sensor can “see” out doorways or windows.

Performance/Economics

• Energy savings from occupancy sensors lighting controls range from 25 to 75 percent.
• Savings from daylighting controls range from 40 to 60 percent.

Resources/Links

Energy Conservation for Housing – A Workbook, HUD, September 1998. Pages 7-129 through 7-132 address installing lighting controls in common areas.

Lighting. Part of the U.S. Department of Energy's Consumer's Guide. Learn about lighting design, controls, types, and maintenance.