Craig DiLouie

Lighting Columnist

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

Articles by Craig DiLouie

October 2011
A high-quality lighting solution for office workers could be to use suspended direct/indirect lighting with fixtures mounted over workstations and a downlight component of the fixture that is individually dimmable by the user. Multiple research studies have linked these choices with comfort and satisfaction. READ MORE
September 2011
The Energy Independence and Security Act of 2007 created new efficiency standards for 40–100-watt (W) incandescent general-service lamps, along with an uproar. As of Jan. 1, 2012, 100W lamps must be 30 percent more efficient, or they will be prohibited from manufacture or import. Jan. 1, 2013 is the deadline for 75W lamps; and Jan. 1, 2014 targets 40 and 60W lamps. READ MORE
August 2011
Dimming offers greater flexibility for lighting systems, providing users with more control over their lighting conditions to support visual needs and enabling energy management strategies that can reduce energy costs. Traditionally limited to high-end commercial building applications, such as conference rooms and private offices, dimming is now being implemented throughout buildings. READ MORE
August 2011
As with other types of lighting, energy codes and legislation are influencing high-intensity discharge (HID) lighting—high-pressure sodium (HPS), metal halide (MH), and mercury vapor—in this era of regulated efficiency. The Energy Policy Act of 2005 eliminated mercury-vapor ballasts—with specialty ballasts allowed by later legislation—encouraging a switch to HPS or white light. READ MORE
July 2011
Wireless radio frequency (RF) lighting controls, popularized for use in higher end residential applications, are emerging as a viable alternative to hardwired controls in commercial building spaces. READ MORE
July 2011
The LED revolution continues to promise many lighting benefits, such as compact size, energy efficiency, long service life with long mean time between failures, no mercury disposal, a resistance to shock and vibration, and no radiated heat or UV output. READ MORE
July 2011
Lighting fixtures are built around a given light source. In the case of LEDs, this task is more complex because LEDs are sensitive to heat and require special means to transfer it away. Additionally, the supporting optics and components are more sophisticated than simply wiring a socket to a ballast. As a result, high-performing LED fixtures are typically highly engineered lighting devices. READ MORE
July 2011
Light-emitting diode (LED) technology enables the lighting industry to reimagine the lighting fixture in bold new ways. Another approach is to design replacement sources for existing conventional fixtures as a way to save energy and gain other potential benefits, including long service life, long mean time between failures, reliable operation in colder temperatures, and resistance to vibration. READ MORE
June 2011
Significant innovation in linear fluorescent lighting is being spurred on by commercial building energy codes, sustainability initiatives, new legislation and regulations, customer demands and competition from other light sources, such as light-emitting diodes (LEDs). Commercial building energy codes are growing more restrictive and increasingly mandate lighting controls. READ MORE