The Changes of ANS Responses due to the Color Temperature of LED Lighting

LED lighting has an advantage to adjust the color temperature. This change of color temperature may derive the change of physiological emotional responses by the visual perception for indoor environments. This research examined the change of physiological emotional responses according to the color temperature of LED lighting. To do this, the environment was configured that the indoor temperature is 20 degrees or less as the perceived uncomfortable environment in winter, then the Electrodermal Activity (EDA) and Electrocardiogram (ECG) were measured as the response of autonomics nervous system (ANS) in the three conditions of color temperature (red: 3862K, white: 5052K, blue: 11460K). As a result, the tendency of occupants’ physiological relaxation was appeared in the blue color temperature condition compared to the white color temperature condition. Although the color temperature of LED lighting might be a small characteristic in terms of the characteristics of indoor environment, it suggests that the color temperature could have a big impact on the physiological changes relatively.