OUTDOOR ILLUMINATING DEVICE AND ILLUMINATING METHOD

摘要

An outdoor illuminating device and illuminating method using LEDs as the light sources to reduce a load to the environment and exhibiting a crime deterrent effect to contribute to environmental design for safe and ease urban development. A crime prevention light (1) capable of simultaneously emitting at least two or more colors of illumination light uses white LEDs (16) and blue LEDs (18) as the light sources. The crime prevention light has a lighting unit body (11) positioned a predetermined distance D above the ground surface (G), a first illuminating part (13) for emitting white illumination light downward in the direction substantially vertical from the lighting unit body (11), and a second illuminating part (14) for emitting blue illumination light to the outside of the area in the direction substantially vertical from the lighting unit body (11).