With the development of artificial lighting technology, human can breakout the limitation of the natural light and make it possible to create a brilliant civilization. However, the wide used outdoor artificial lighting caused severe environmental problem called "Light Pollution" due to human's less cognition of using light and excessive light. Obtrusive light at nighttime can do harm to the human health and observation activity. In this paper, the upward light control process of general lighting fixtures was suggested for reducing the adverse effects such as sky glow in the central city and light trespass in the residential areas.

• 이영진(단국대학교 일반대학원 건축공학과 ,석사과정) | Lee Young-Jin Corresponding author
• 서영석(단국대학교 건축대학 건축공학과 대학원 박사과정) | Seo, Young-Seok
• 류춘덕(단국대학교 일반대학원 건축공학과 ,석사과정) | Liu Chun-De
• 오민석(단국대학교 건축대학 건축공학과 연구교수, 공학박사) | Oh, Min-Seok
• 김회서(단국대학교 건축대학 건축공학과 정교수, 공학박사) | Kim, Hway-Suh