Craig DiLouie

Lighting Columnist

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

Articles by Craig DiLouie

September 2008
Here’s a light source with the potential to reduce the nation’s energy costs by 6–7 percent, to reimagine the light fixture as a highly compact and dynamic element, to keep 2 to 4 tons of mercury out of landfills and incinerators each year, and to give building owners lighting that doesn’t require lamp replacement for up to a decade or longer. READ MORE
September 2008
In 1972, the Illuminating Engineering Society of North America (IESNA) recommended a light level of 70 foot-candles (fc) for typical tasks in open offices, which was typically provided by magnetic-ballasted F40T12 2-by-4 troffers, creating a lighting power density (LPD) as high as 5.5W per square foot. By 1990, IESNA had refined its recommendation to 15–50 fc. READ MORE
August 2008
Enrollment in public elementary and secondary schools rose 24 percent between 1985 and 2006, according to the National Center for Education Statistics. In 2006, nearly 50 million students were using more than 385,000 school buildings. READ MORE
July 2008
Electrical contractors don't like to brag, but they are enjoying a -significant and growing influence in lighting decisions. READ MORE
June 2008
ASHRAE STANDARD 90.1 Energy-Efficient Design of New Buildings Except Low-Rise Residential Buildings establishes minimum standards for designing energy-efficient buildings. In January, ASHRAE released 90.1-2007, and states could begin the process of adopting it, verbatim or amended, as their energy code. Clarifications and refinements with a major revision for additional power allowances are new. READ MORE
May 2008
The Energy Independence And Security Act of 2007 created higher efficiency standards targeting today’s 40–100W incandescent and halogen general-service lamps. Starting Jan. 1, 2012, 100W lamps will have to become 30 percent more efficient or be prohibited from manufacture and import; Jan. 1, 2013, targets 75W lamps; and Jan. 1, 2014, targets 40W and 60W lamps. READ MORE
April 2008
Lighting maintenance can play a part in a lighting upgrade project in three ways. First, proper maintenance can increase average light levels, potentially increasing energy savings in a retrofit. Second, it ensures the new lamps continue to be installed over time without “snap back”—accidental reversion back to the old lamp type that fits the same socket. READ MORE
March 2008
After Jeff McCullough's talk at Intertech’s LEDs October 2007 conference, an audience member declared that McCullough’s employer, the U.S. Department of Energy (DOE), is “taming the Wild West” and suggested that he wear a cowboy hat. READ MORE
February 2008
Hindering adoption of advanced lighting control strategies is the idea of whether these strategies work together in combination as advertised to produce consistent energy savings and worker satisfaction, thereby justifying a higher initial cost. This was the subject of a new office lighting field study by the National Research Council Canada (NRC) Institute for Research in Construction. READ MORE