Craig DiLouie

Lighting Columnist

Craig DiLouie is a journalist and educator specializing in the lighting industry. Learn more at and​

Articles by Craig DiLouie

November 2012
Innovation in fluorescent lighting continues to be fueled by product and building regulations, utility rebates and market preference for products that can deliver lower energy and maintenance costs. The rare earth crisis, however, has pressured manufacturers to shift some of their focus from value-added to lower cost solutions. READ MORE
October 2012
More than 8 billion lamps illuminate the United States, accounting for nearly 20 percent of all electricity consumption in the nation, according to a study released by the Department of Energy (DOE). The “2010 U.S. READ MORE
October 2012
The International Energy Conservation Code (IECC) is a model residential and commercial building energy code produced by the International Code Council, an organization dedicated to building safety and fire prevention. The IECC provides a list of requirements and minimum standards regulating building design, including lighting and other energy-using systems. READ MORE
September 2012
Is it possible that some T5 lighting fixtures are perfectly efficient? One might get that idea based on some efficiency ratings of 98–100 percent, although it might not seem possible. Such a rating must be a mistake, right? But it’s not. We’re talking about luminaire (lighting fixture) efficiency, of course—the percentage of lumens produced by the lamp that exit the fixture. READ MORE
September 2012
Lighting choices can affect how we perceive spaces, even the colors of objects and surfaces. As a result, lamp color characteristics are a critical factor in a wide range of spaces, from high-end retail, where merchandise must be presented as vibrant and in its true colors, to offices, where good lighting renders faces naturally and facilitates interaction. READ MORE
August 2012
Rebates and incentives offered by electric utilities and regional energy-efficiency organizations are currently enjoying a major upswing, providing a significant resource that can reduce the cost of investing in energy-efficient lighting. Rebates are offered as part of least-cost resource planning. READ MORE
July 2012
On Nov. 14, 2011, the Department of Energy (DOE) announced new fluorescent lamp ballast efficiency standards that take effect Nov. 14, 2014, and affect seven product classes. These regulations cover T8, T5 and T12 ballasts, including ballasts designed for nonresidential and previously exempted residential use. They also cover previously exempted outdoor sign and T12 dimming ballasts. READ MORE
June 2012
On July 14, 2012, Department of Energy (DOE) standards covering many popular incandescent reflector lamps will take effect, eliminating a majority of lamps from the market in favor of more efficient, higher cost alternatives. READ MORE
May 2012
Stairwell lighting is typically operated continuously at full output in nonresidential buildings even though these spaces are only intermittently used. In recent years, lighting manufacturers have begun offering a solution that can reduce energy costs while providing satisfactory levels of illumination for emergency egress. These lighting fixtures adjust light levels based on occupancy. READ MORE