This study aimed to utilise the characteristics of light-emitting diode (LED) lighting, including the adjustable correlated colour temperature (CCT) and illuminance levels, to evaluate the effects of various CCT and illuminance level combinations on visual perception and their patterns
under different lighting conditions. Five white light balances with different CCTs were created together with four levels of illuminance. Based on the patterns of visual perception, when the CCT increased with the illuminance levels, the participants’ visual perception changed from dim,
boring, and sleepy to intense, vivid, energetic, and bright. As the CCT decreased, the participants gradually perceived the lighting as warm and relaxing. As illuminance levels increased, dim and unpleasant feelings progressively changed to bright and pleasant ones. The study attempted to
identify lighting combinations that can respond to different psychological needs and can be used as a guide in the future design of lighting equipment.
Practitioner summary: Appropriate lighting conditions could aid individuals in increasing the quality of life. This study conducted
an experiment to evaluate the effects of various correlated colour temperature and illuminance level combinations on visual perception by using LED lighting. The results showed the effect of the different lighting combinations on the visual perception of the participants.
LED: light-emitting diode; CCT: correlated colour temperature; K: Kelvin; lx: Lux; CIE: Commission Internationale de l’Eclairage; ANSI: American National Standards Institute
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correlated colour temperature;
Document Type: Research Article
Electronic and Optoelectronic System Research Laboratory, Industrial Technology Research Institute, Hsinchu, Taiwan (R.O.C);
Department of Industrial Engineering and Engineering Management, National Tsing Hua University, Hsinchu, Taiwan (R.O.C)
February 1, 2020
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