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

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.
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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.
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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.
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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
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

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