Originally published in Interiors & Sources

11/22/2010

LED Lighting Technology: Looking to 2011

By Eric Woodroof, Ph.D., CEM, CRM

 
  • LED Lighting Technology: Looking to 2011

    LED Lighting Technology: Looking to 2011

    /Portals/2/ATWeekly/1110/A_1110_ATW_LEDLighting2.jpg

    High-intensity discharge (HID) fixtures provide a strong white light, making them ideal for factories, warehouses, and parking lots.

    LED Lighting Technology: Looking to 2011
  • LED Lighting Technology: Looking to 2011

    LED Lighting Technology: Looking to 2011

    /Portals/2/ATWeekly/1110/A_1110_ATW_LEDLighting1.jpg

    Offices, homes, and schools usually require warm lighting with a color temperature of 3500K. The color and warmth of lighting sets an immediate mood and affects how people see other colors in the space.

    LED Lighting Technology: Looking to 2011
  • LED Lighting Technology: Looking to 2011

    LED Lighting Technology: Looking to 2011

    /Portals/2/ATWeekly/1110/A_1110_ATW_LEDLighting3.jpg

    LEDs in tubes, like this sample installation with and without coated glass at Southern Company’s Technology Applications Center, have a long payback period at $50 per lamp, but the color is excellent.

    LED Lighting Technology: Looking to 2011
  • LED Lighting Technology: Looking to 2011

    LED Lighting Technology: Looking to 2011

    /Portals/2/ATWeekly/1110/A_1110_ATW_LEDLighting4.jpg

    At one research facility, an engineer created his own fixture by taping concentric rings of paper together, cutting down on the glare and intensity of the LED light in his office.

    LED Lighting Technology: Looking to 2011

During the past six months, I have toured many facilities that are testing various applications of LED lighting technology. Although LED lighting technology is improving (and this article will probably be obsolete within one year), we can draw some basic conclusions based on the technology available today. Hopefully, this can guide facility managers to either embrace or avoid LED technology for applications in 2011.

These conclusions are based on data from research divisions of utilities who actively test LED lighting fixtures and many other energy-related technologies to determine their economic feasibility.

Many utilities across the country have “technology application centers” or mini-labs that test and demonstrate energy technologies. If your utility has such a center, you may want to ask for a tour to see the applications of LED with your own eyes. Some utilities also are testing technologies such as food processing and industrial refrigeration equipment, plug-in hybrids, renewable technologies, and industrial applications.

I have toured utility research centers on the coasts, such as Southern California Edison and New York Power Authority, as well as centers in the Midwest (Oklahoma Gas and Electric) and the South (Southern Company). All of these utilities had active programs to demonstrate new lighting fixtures in a variety of applications. Special thanks to Mr. Doug Avery, project manager at SCE, who allowed me to take some pictures of the utility’s testing activities.

LED Technology and Lighting Considerations
As we all know, energy efficiency recommendations that involve lighting must be sensitive to the quality of light that a retrofit will provide. Specifically, the color or “warmth” of the lamp sets an immediate mood for a space, so if you change lights and change the color, you may impact the productivity of the occupants.

The other major consideration is the Color Rendering Index (CRI), which indicates the occupant’s ability to distinguish colors under a certain lamp. Beyond these two criteria, most lighting manufacturers have been trying to develop lamps that give more lumens per watt, have longer lamp lives, and are cost-effective.

LEDs are available in a variety of color temperatures providing “warm” or “cool” effects. Inside offices, homes, and other locations, many people prefer a warm atmosphere with lights that have a color temperature rating of 3500k. 

However, most people prefer a white light for High Intensity Discharge (HID) applications, such as a factory, warehouse, or parking lot. In recent years, the price for an LED lamp that would replace a metal halide lamp has dropped by more than 66%.

Read more about the possibilities of LED in part 2 of LED Lighting Technology: Looking to 2011 >>>




 


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Visit our website today to learn about the design flexibility of a Morton building and the endless possibilities of partnering with our designBUILD team.


Wood construction is both cost and energy efficient. Check out Morton Buildings and our designBUILD team online today to discover all the benefits of post-frame construction.


When choosing a metal-clad building for your next construction project, consider Morton Buildings, Inc., and their designBUILD team, we’ll make your dream a reality.

We Can Help You Reduce Energy by 30%

Our mission is to help our customers manage their buildings' energy costs, improve reliability, and enhance performance while having a positive impact on the environment.
CLICK HERE to find out how.

Add highly responsive multi-zone comfort to any building project, in any climate. Our CITY MULTI H2i R2- and Y-Series VRF systems give you flexibility to fit the needs of any building. Enjoy 100% heating capacity at 0°F outdoor ambient, and 85% heating capacity at -13°F outdoor ambient.  For more information, log on to www.mitsubishipro.com

 
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