Craig DiLouie

Lighting Columnist

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

Articles by Craig DiLouie

March 2017
Milestones in January and February raised the bar on energy efficiency in the lighting industry. In January, Energy Star Lamps V2.0 took effect, and it was predicted to significantly influence lamps promoted by utility lighting rebate programs. In February, new Department of Energy (DOE) rules took effect, regulating the efficiency of metal-halide ballasts sold as part of new luminaires. READ MORE
  • Lighting controls save energy by turning off or reducing lighting when it's not needed. The smarter the control and the more flexible the light source, the greater precision in delivering maximum energy savings. Because LED lighting is instant-on and easily controllable, outdoor lighting control now offers higher energy cost savings through flexibility.
March 2017
According to the U.S. Department of Energy (DOE), about 160 million lamps operated in the building exterior, parking area and roadway lighting markets in 2010. Building exterior made up 39 percent of these lamps, parking 33 percent and roadway 28 percent.
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February 2017
As demand for LED lighting and controls increases, the lighting world is becoming more complex, which raises demand for expertise to produce good lighting solutions. Unlike other professions, lighting designers do not require state licensure. To encourage and promote expertise, the lighting industry has developed a series of certifications that demonstrate proficiency while providing confidence. READ MORE
  • A suitable application for tunable white lighting is in classrooms. The system used in the room shown above offers four settings. In “calm” mode, the lights are set at a standard intensity level and warm shade of white light, oriented toward calming an excited class.
February 2017
The color appearance of light sources can have a major impact on how people perceive spaces. In high-end retail, hospitality and similar applications, color temperature choice is a critical design decision. READ MORE
January 2017
In its latest LED energy savings forecast, the U.S. Department of Energy (DOE) predicts LED lighting will represent 30 percent of the installed lighting base within five years and 59 percent by 2025.
 The biannual report, “Energy Savings Forecast of Solid-State Lighting in General Illumination Applications,” estimates penetration in 2015 at 6 percent, doubling from 3 percent in 2013.
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January 2017
Major lighting trends—including LED, intelligent lighting controls, the industrial Internet of Things (IIoT), power over ethernet (PoE), energy codes, and light and health—are creating new opportunities and challenges for electrical contractors. READ MORE
  • Replacing the driver

December 2016
The majority of LED lighting products use an electronic driver that functions similarly to a fluorescent ballast. The driver converts incoming alternating current (AC) to direct current (DC) and drives this current to the LEDs.
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December 2016
Flicker in light sources is an old problem made new again in the LED age. Its effects range from annoying to debilitating, and solving it can be challenging. Even defining flicker is difficult. Whether a problem is likely to occur depends on the light source, lighting conditions, how sensitive occupants are to it and the tasks being performed.
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November 2016
LED streetlights have the potential to reduce energy consumption by about 50 percent compared to traditional high-pressure sodium lights. According to a U.S. Department of Energy (DOE) survey of governments and utilities, 62 percent of respondents reported using LED sources in their streetlighting. READ MORE

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