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

May 2011
The current focus on saving energy is accelerating demand for luminaires, or lighting fixtures, designed to achieve a high level of energy efficiency. READ MORE
April 2011
The creators of the ASHRAE/IES 90.1 energy standard set an aggressive goal for the 2010 version, published in November 2010: 30 percent energy savings over the 2004 version. According to a detailed analysis conducted by the Department of Energy, they hit it. READ MORE
April 2011
Some industry observers have predicted that solid-state lighting technology (SSL) will satisfy most lighting applications by the end of the decade. One particular SSL technology on the cusp of commercialization has the potential to be transformational: the organic light-emitting diode (OLED). READ MORE
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

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