Craig DiLouie

Lighting Columnist

Craig DiLouie, a lighting industry journalist, analyst and marketing consultant, is principal of ZING Communications. He can be reached at www.zinginc.com.

Articles by Craig DiLouie

March 2011
A new national energy standard took effect on Dec. 30, 2010. On that day, all states had to certify to the U.S. Department of Energy (DOE) that they had a commercial building energy code in place at least as stringent as ASHRAE/IES 90.1 2004 or justify why they could not comply. The new standard supersedes ASHRAE/IES 90.1 1999, recognized as the national energy standard since 2004. READ MORE
February 2011
Energy standards implemented by the Department of Energy (DOE) and the Energy Policy Act of 2005 largely eliminated the manufacture and importation of fluorescent T12 magnetic ballasts in 2010, and new DOE standards will eliminate many popular 4- and 8-foot T12 lamps in 2012. READ MORE
February 2011
Lighting ordinances enacted across the United States in recent years have sought to reduce light pollution, such as skyglow, which is light emitted into the sky that obscures a view of the stars, and light trespass, which is light emitted onto neighboring properties. READ MORE
January 2011
Because surfaces and objects in typical spaces reflect light, they can play a part in lighting efficiency as extensions of the lighting system. By controlling room surface reflectances, light levels can be improved, creating opportunities to save energy. If light is not absorbed by a surface, it is reflected or transmitted to other surfaces. READ MORE
December 2010
The green design—good for the environment in that it makes buildings more sustainable—can be bad for lighting, as designers are incentivized to chase points that may require sacrifices to design. For lighting, it can be especially risky. Lighting power allowances in energy codes regulating new buildings have steadily declined over the last decade, enabled by advances in technology. READ MORE
December 2010
In part 1 of this two-part series on photosensors, I described the major characteristics of photosensors and ended with a problem: suppose we have a classroom in which we want to begin dimming the row of fluorescent lighting fixtures adjacent to a series of windows when daylight levels reach 150 percent of design light levels. What kind of photosensor will we need? READ MORE
November 2010
Daylight harvesting’s value proposition is fairly simple: as daylight levels increase in a space, electric lighting levels can be automatically reduced to maintain a target task lighting level and save energy. Because this system is automated, a device is needed to tell a controller that there is a high enough light level to warrant reduction of electric lighting. READ MORE
October 2010
Light-emitting Diode (LED) replacement lamps, including omnidirectional, directional and decorative lamps, are now proliferating the market. Unfortunately, many of these products have been of poor quality, according to CALiPER independent product testing conducted by the Department of Energy (DOE). READ MORE
September 2010
Once a venerable workhorse in commercial lighting, the fluorescent magnetic T12 ballast is now considered a dinosaur. All but extinct in new construction, there are still millions of these ballasts installed in commercial buildings throughout the United States. Now they are facing extinction in existing buildings, as replacement ballasts stop being available due to energy legislation. READ MORE

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