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Posts Tagged Color rendering index

Understanding white color terminology

Even though human eyes behave like miniature cameras, the film or digital sensors that cameras use to measure the level of light are not as forgiving as our eyes when it comes to perceiving natural colors in various lighting environments. Understanding the composition of white color light has numerous applications in photography, film-making and light design consultation.

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Ceramic Metal Halide Lighting Basics

CMH Street Lights in Chicago

Ceramic Metal Halide is relatively new light source, touted for being compact, efficient, and powerful. CMH is part of the high-intensity discharge (HID) lighting category, which offers the highest efficacy and longest life of any lighting type, and saves up to 90% of lighting energy when they replace incandescent lamps.

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Is Color Quality Scale (CQS) an improvement on CRI?

Solid state lighting industry at an impasse efforts to replace CRI with CQS (Color Quality Scale) As advances in solid state lighting products, especially LEDs, continue to push into the marketplace displacing incandescent and fluorescent lighting products, it only stands to reason that evaluation methods for these products, such as the measurement of color fidelity, or CRI – now almost 50 years old – isn’t cutting it. As we mentioned in a previous article, CRI has been found to be an inaccurate, unreliable predictor of color preference of solid-state lighting products such as light-emitting diodes (LEDs), which emit a much different […]

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What is Color Rendering Index (CRI)

Color Accuracy

CRI measures on a scale of 0 to 100 how a light source shifts the location of eight specified pastel colors compared to the same colors lit by a reference light source of the same CCT. A CRI of 100, or perfect color rendering, means the light source renders the eight colors exactly how the reference light source renders them.

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LED Lighting Basics

LED technology: changing the future of lighting Understanding the fundamentals of solid state lighting The light-emitting diode (LED), one of the most energy-efficient and rapidly-developing lighting technologies, has the potential to fundamentally change the future of lighting in the United States. That’s according to the Department of Energy (DOE), which also predicts that by 2027 widespread use of LEDs, also called solid state lighting, could save the equivalent annual electrical output of 44 large electric power plants (1,000 megawatts each), and a total savings of more than $30 billion at today’s electricity prices. “The potential of LED technology to produce […]

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Energy Efficient Lighting Basics

The Basics of Energy Efficient Lighting

Modern energy efficient lighting technology is rapidly evolving and is creating opportunities for U.S. businesses and consumers alike to save money and the environment. Lighting represents about 20% of all electricity use in the United States with the cost to businesses and consumers topping $50 billion a year, according to the Department of Energy (DOE). That’s the same dollar amount the federal agency estimates is being wasted annually by the owners of 2.8 million U.S. commercial, industrial and institutional buildings that rely on outdated lighting systems. A company maintaining a standard 50,000-square-foot commercial building can spend up to $45,000 annually […]

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