Lighting

 

 

Lighting and controls is a huge, constantly changing, dynamic market. The ELECTRICAL CONTRACTOR lighting editorial listed below keeps current on technological innovations from LEDs, controls, and design to innovations in efficiency by traditional lighting formats. 

Organic LED (OLED) is a solid-state lighting technology with strong potential for architectural lighting. The LED is a compact, directional point source. Shielding prevents glare, while heat sinking removes internal heat. In contrast, OLED is a flat (less than 1/8-inch thick), diffuse area source.

Human perception of colors in their environment is dependent on light. As electric light sources have varying spectral emissions, the electrical industry relies on metrics to report, evaluate and predict how colors will appear under different light sources.

According to the U.S. Department of Energy (DOE), more than 360 million troffers (named for a cross between trough and coffer) provide general lighting in commercial building interiors.

Over the last seven years, the LED Streetlight Replacement Program in Los Angeles has swapped more than 80 percent of the city’s 215,000 streetlight fixtures with LED units. To date, energy usage has lowered by 63 percent, saving the city approximately $9 million per year in energy costs.

More on Lighting

 
Under Control: Outdoor LED Lighting

 Fixture by fixture, lighting in American cities is transitioning from the traditional metal halide domain to light-emitting diodes (LEDs), not only on city streets, but also in landscaping and commercial building settings.


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Brightening the Big Box

“Warehouse lighting projects are always financially driven,” said Brandon North, 
service manager, Commonwealth Electric Co., an electrical contractor with offices in Nebraska, Iowa and Arizona.


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Getting It Right

daylight harvesting control systems have become a common feature in green buildings, and with ASHRAE/IES 90.1 2010 now the baseline energy design standard, it also is expected to become a staple in mainstream construction. 



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A Whole New Ballgame

ASHRAE/IES 90.1, Energy Standard for Buildings Except Low-Rise Residential Buildings, was developed as a model commercial building energy code that jurisdictions can adopt in whole or in part.


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Dimming Demand: Lighting Control in Demand Response

The average commercial building electric bill often features a consumption and demand component. The consumption component reflects the amount of electric energy (kilowatt-hours) used, and the demand component shows the maximum demand (kilowatts) during the billing period.



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Hard Numbers: Responsive Lighting

Estimating lighting control energy savings is challenging, as actual savings depend on application characteristics, such as occupant behavior, building design, site orientation, daylight apertures, interior reflectances, device settings and level of commissioning.


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Acuity Brands' Aera recessed luminaires have three control functions to manage the white ambient light independently.
The Right Light: Color Tuning

While light makes sight, lighting shapes perception, particularly in regard to color in the things we see. This is because visible white light is made of colors. For us to see an object as a certain color, that color must be present in both the light and the object.



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