- Lighting controls best practices are found in energy standards and green building certification programs.
- Standards include ASHRAE 90.1 and green certifications like U.S. Green Building Council's LEED v4.
- For more advice, see the lighting control protocols guide from the Illuminating Engineering Society.
LED lighting upgrades are a great way for facilities of all types to reduce their energy costs. Adding controls can reduce those cost even more, but only if they are designed, installed and operated properly. How? Energy standards, green building certification programs and Illuminating Engineering Society (IES) recommendations can provide some guidance.
Getting up to standard
Lighting controls are increasingly essential in meeting building energy codes and standards. For example, the widely used ASHRAE 90.1-2010 Energy Standard for Buildings requires the following:
- Automatic lighting shutoff control in all spaces
- One control step between 30 and 70 percent level in addition to all-off
- Automatic daylighting controls in primary zones
- Exterior lighting off during the day and reduced level at night
Later versions of this standard prescribe even more controls. ASHRAE 90.1-2013 calls for dimming to 50 percent of design power for intermittently used spaces such as corridors and stairwells, as well as use of daylight-responsive controls in secondary and primary daylight zones. ASHRAE 90.1-2016 requires that all lighting be automatically turned off when not in use, except for areas where automatic shutoff causes safety or security concerns.
LEEDing the way
The LEED v4 green building certification from the U.S. Green Building Council (USGBC) requires additional lighting controls. To earn points in the Energy and Atmosphere and Indoor Environmental Quality sections, your project must:
- Meet or exceed all ASHRAE 90.1-2010 lighting requirements
- Provide at least 90 percent of individual occupants (100 percent of shared multioccupants) with lighting controls (includes task lighting)
- Include task tuning capability
- Time scheduling
- Task tuning
- Daylight harvesting
- Personal control
- Demand response
- Receptacle control
Two IES energy management documents will be very helpful in this regard. LEM-7-13 Lighting Controls covers energy-saving strategies, design considerations and the commissioning of lighting controls. TM-23-11 Lighting Control Protocols covers physical aspects of lighting control such as pulse width modulation for LED Dimming and various communication protocols, such as Zigbee and TCP/IP.
Who's using controls?
These standards, technology advances and falling prices are driving the adoption of energy-efficient lighting with controls. How are building owners responding? The latest U.S. Department of Energy data provides some answers.
So if you want to stay ahead of the competition, following the latest recommendations and advice on lighting controls from standards and industry experts. With proper design and installation, you'll create control systems that will maximize savings and convenience and keep your customers happy.
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