Psychological evaluation of street lighting environment at night

摘要

Recently, new lighting technologies such as light emitting diodes (LEDs) have started to be used for street lights. These technologies would enable us to design new street lighting systems more flexibly in terms of spatial arrangement. They also allow us to use more colors for street lights. Many studies related on influence of street lights on psychological or physiological responses have been conducted. Light sources that provide perception of greater brightness than others at the same luminance are likely to be perceived as producing a safer environment. Other study reported that lighting colors affect visibility, brightness and physiological responce. However, it is not known exactly the relationship between the impresison on street at night and characteristic of street lights, and also not known the evaluation structure of street at night.