22 August, 2017
MacAdam Ellipse

David MacAdam (July 1910 – March 1998), American physicist, made important contributions to the field of color perception. One of his experiments —maybe the most famous— consisted of showing to different colors to a subject….

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16 June, 2017

Despite the big advances made on recent years, during the production process of LEDs, there are still some small variations that affect some of their features, optical as well as electrical. That’s the reason why…

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22 May, 2017
Facts of life

The reference value that we use to indicate the duration of an incandescent bulb is known as its average life. Does that mean that a bulb with an average life of 5,000 hours must last…

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02 May, 2017
Color Reproduction Index (CRI)

The Color Reproduction Index indicates the ability that a light source has to accurately reproduce the colors of the objects, compared to a reference light source that we consider ideal. The maximum value is CRI= 100….

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06 April, 2017
Chromatic/color reproduction vs CRI

The concept of chromatic, or color, reproduction, refers to the way in which objects appear when they are lighted by a light source. In order to assess the quality of the result, there are at…

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16 February, 2017
LED’s light efficiency vs. other sources’ efficiency

Luminous efficiency: ratio of the total luminous flux radiated to the power absorbed. Ever since its first appearance in the market, LED’s luminous efficiency has significantly increased. Today’s medium-level range products are 4 times more…

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31 January, 2017
How do LEDs work

Have you ever wondered why, when a bunch of electrons fly out of their orbit —thus  occupying a higher energy level inside the atom—, once they are back to their initial place due to the…

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12 January, 2017
The importance of light, II: in a project

In our previous post, The importance of light, I: in life, we introduced artificial light as a substitute when natural light disappears. In any kind of project, the architect, the interior designer, the set designer,…

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