Semiconductor Physics, Quantum Electronics & Optoelectronics, 25 (1), P. 076-082 (2022).

RGBW lighting systems: Influence of the white LED
D.O. Kalustova1, V.I. Kornaga1, A.V. Rybalochka1, S.I. Valyukh2

1V. Lashkaryov Institute of Semiconductor Physics, NAS of Ukraine, 41, prosp. Nauky, 03680 Kyiv, Ukraine,
1Department of Physics, Chemistry and Biology, Linköping University, 58183 Sweden, Linköping

Abstract. People spend most of the time under artificial light sources, so it is important to create a comfortable lighting environment for work and rest. Four-component RGBW systems are the most effective for this. It is needed to create methods for obtaining white light with the specified parameters and choose the most optimal LED components. In this work, the influence of the white LEDs parameters on the resulting white light of the RGBW systems is studied. Two different methods proposed by us earlier for obtaining white light are applied for three RGBW systems with different warm white LEDs. It is shown that the use of white LEDs with a colour rendering index close to 80 is more optimal for most applications. In this case, they provide the resulting white light with the colour rendering index above 90 and luminous efficacy above 130 lm/W.

Keywords:LED, RGBW systems, tuneable white light, colour rendering, smart lighting.

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