Craig DiLouie

Lighting Columnist

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

Articles by Craig DiLouie

  • Internet of Things
November 2017
At the 2017 Strategies in Light conference, Robert F. Karlicek, Jr., spoke about creative destruction in the lighting industry brought on by LED technology and the internet of things (IoT). Karlicek is a professor and director for the Center for Lighting Enabled Systems and Applications at the Rensselaer Polytechnic Institute, Troy, N.Y.
October 2017
Networked lighting controls are intelligent and programmable systems in which devices communicate to enact control strategies. Despite the extraordinary potential of these systems, adoption has been inhibited by difficulty in reliably projecting energy savings, unfamiliarity among specifiers and, notably, contractors, interoperability and complexity issues and cost. READ MORE
September 2017
High-intensity discharge (HID) lamps, notably metal halide and high-pressure sodium, are widely installed in industrial, retail, and other applications. In recent years, the LED revolution has produced retrofit options promising up to 50 percent energy savings and long service life. READ MORE
August 2017
Traditionally, commercial electrical systems are based on alternating current (AC). The utility grid delivers AC power, which the building distributes. Low-voltage devices include a rectifier that converts AC to direct current (DC), with associated electrical losses.
July 2017
In commercial building applications, dimming either is used to support visual needs (usually in response to manual input) or to save energy (usually in response to automatic input). As the majority of LED products are dimmable, the proliferation of LED lighting has increased availability and use of dimming.
June 2017
The ASHRAE/IES 90.1 energy standard provides legal jurisdictions with a model commercial building energy code. The 2013 version is the national energy reference standard recognized by the U.S. Department of Energy. The International Energy Conservation Code recognizes 90.1 as an alternative compliance standard.
May 2017
Organic LED (OLED) is a solid-state lighting technology with strong potential for architectural lighting. The LED is a compact, directional point source. Shielding prevents glare, while heat sinking removes internal heat. In contrast, OLED is a flat (less than 1/8-inch thick), diffuse area source. Depending on the product, one can view it directly without glare. READ MORE
April 2017
Human perception of colors in their environment is dependent on light. As electric light sources have varying spectral emissions, the electrical industry relies on metrics to report, evaluate and predict how colors will appear under different light sources. In applications such as supermarkets, retail, showrooms and hospitality, properly rendering colors is imperative.
April 2017
According to the U.S. Department of Energy (DOE), more than 360 million troffers (named for a cross between trough and coffer) provide general lighting in commercial building interiors. With their standard dimensions of 2-by-4, 1-by-4 and 2-by-2, these luminaires are popular in dropped, acoustical-tile ceilings with a low ceiling height (less than or equal to 9 feet). READ MORE