Craig DiLouie

Lighting Columnist

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

Articles by Craig DiLouie

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
June 2011
The use of Ambient/task lighting is a lighting design approach that combines a direct/indirect general lighting layer and a task lighting layer. The general lighting layer provides low-level ambient illumination, and the task lighting layer provides higher light levels required to complete critical visual tasks. READ MORE
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
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