Archive for the ‘Craig’s TED Magazine Articles’ Category

Metal Halide Rule Takes Effect

My contributions to the February issue of tED Magazine included an update on metal halide rules. Reprinted with permission. On February 10, 2017, U.S. Department of Energy (DOE) rules take effect that regulate the efficiency of metal halide lamp ballasts sold as part of new luminaires. These rules update existing energy efficiency standards created by […]

Color Study Challenges CRI

Below is one of my contributions to the January issue of tED Magazine, the official publication of the NAED. Reprinted with permission. A study recently published in the journal Lighting Research & Technology explored human preference related to light source color. The results challenge the ability of the color rendering index (CRI) metric to predict […]

What’s New in LED Drivers

Below is my lighting column published in the January issue of tED Magazine. Reprinted with permission. The majority of LED lamps and luminaires feature an electronic driver that performs the same basic function as a fluorescent ballast. The driver converts AC supply voltage to DC and drives current to the LED source. In the traditional […]

Five Major Trends in Indoor LED Luminaires

Below is my lighting column published in the October issue of tED Magazine. Reprinted with permission. Strategies Unlimited has forecasted that by 2022, LED luminaires will achieve a 60 percent share of global luminaire shipments. In the U.S., three major manufacturers of indoor LED luminaires say LED already constitutes a majority of their indoor luminaire […]

A Closer Look at Latest DOE LED Energy Savings Forecast

A recent contribution to tED Magazine. Reprinted with permission. The Department of Energy (DOE) recently updated its bi-annual report, Energy Savings Forecast of Solid-State Lighting in General Illumination Applications. This major report models adoption of LEDs in the U.S. general lighting market. In 2015, LED products comprised an estimated 6 percent of the total installed […]


Below is my lighting column published in the July issue of tED Magazine. Reprinted with permission. Founded in 1992, the U.S. Environmental Protection Agency’s (EPA) ENERGY STAR is a voluntary product labeling program designed to help consumers identify and promote energy-efficient products. These products include lamps and residential luminaires. Consumers recognize the ENERGY STAR label […]

Energy Code Deadline Nears

Below is a short news piece I wrote for the July issue of tED Magazine. Reprinted with permission. On September 26, 2014, the U.S. Department of Energy (DOE) named the ASHRAE/IES 90.1-2013 energy standard as the new national energy reference standard, superseding the 2010 version. What this means: Before October 2016, all states in the […]

Trends in LED Optics

Below is my lighting column published in the June issue of tED Magazine. Reprinted with permission. The large majority of commercial building luminaires feature some type of optical system that controls the light emission. The type of optics employed ultimately determines where light is directed, how much light reaches that point, and with how much […]

Tunable-White Lighting

This article about tunable-white lighting was originally published in tED Magazine. Reprinted with permission. The color appearance of light sources—whether warm or neutral or cool—can have a big impact on how people and spaces are perceived. In applications like hospitality and high-end retail, the color temperature of a light source is a critical design decision. […]

Introduction to Lighting Design

Another contribution to the March issue of The Electrical Distributor provides a primer on lighting design. Reprinted with permission. It’s often said that lighting is as much an art as it is engineering, but the art of design can be reduced to a series of guiding principles. By understanding these principles, electrical distributors demonstrate expertise […]