12 May 2020 Red, green, blue, and white clusters for daylight reproduction
Daria Kalustova, Vasyl Kornaga, Andrii Rybalochka, Vadym Mukhin, Yaroslav Kornaga, Sergiy Valyukh
Author Affiliations +
Abstract

Daylight is an inherent attribute of a sustainable building. Artificial reproduction of natural illumination under varying needs and environmental conditions has been made possible after the appearance of the new wave of solid-state light sources. Our work is devoted to the development of white light-emitting diode (LED) clusters consisting of red, green, blue, and white (RGBW) LEDs for implementation in a smart lighting system that is able to reproduce light with correlated color temperature (CCT) similar to daylight, high values of color rendering index, and luminous efficacy. A method for determination of the optimal contribution of each of the four LEDs is demonstrated and discussed. We show that only three LEDs—green, blue, and white (no red) can be used in many cases for reproducing daylight. Both luminous efficacy of radiation and actual luminous efficacy of the considered RGBW clusters as functions of the CCT are analyzed.

© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2020/$28.00 © 2020 SPIE
Daria Kalustova, Vasyl Kornaga, Andrii Rybalochka, Vadym Mukhin, Yaroslav Kornaga, and Sergiy Valyukh "Red, green, blue, and white clusters for daylight reproduction," Optical Engineering 59(5), 055102 (12 May 2020). https://doi.org/10.1117/1.OE.59.5.055102
Received: 23 December 2019; Accepted: 27 April 2020; Published: 12 May 2020
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Cited by 2 scholarly publications.
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KEYWORDS
Light emitting diodes

RGB color model

Luminous efficacy

LED lighting

Light sources and illumination

Optical engineering

Line edge roughness

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