APPEARANCE OF HUMAN FACE AND ATMOSPHERE OF ENVIRONMENT UNDER LED STREET LIGHTS USING DIFFERENT CORRELATED COLOUR TEMPERATURE

摘要

In this study, the authors evaluated the correlated colour temperature effects of LED lighting on human facial appearance and night-time outdoor environment. The results of this evaluation show facial visibility, street brightness, sense of security, colour differentiation, cool/warm feeling, preference of atmosphere and adequateness of lighting under average illuminance on a recreated road surface set at 2 to 5 lx. The aim of this study is to provide a safe and reasonable environment with regards to lighting in outdoor public spaces.