The Field Office Survey for Lighting Environment in Taiwan

Abstract

Lighting consumes approximately 24.8% of the electrical energy supplied to office buildings in Taiwan. Even if those estimations are difficult to verify and might not be completely consistent, these figures lead to one important finding: around the world, the scientific community seems to agree that discussing the article lighting loads of buildings is extremely important and that energy-efficient lighting solutions have to be adopted. In order to guarantee an appropriate visual comfort in office, the horizontal illumination (especially on the working plan) must be sufficiently enough. According to CIE, it is suggested in 200 lux to 500 lux in offices, and CNS (Chinese National Standards, Taiwan) is 500 lux in Taiwans offices. According to survey and questionnaire, 500lux maybe is too high for employee in Taiwan. When the illuminance is below 500lux, brightness and satisfaction is not bad, and when the illuminance is over 500lux, brightness and satisfaction is not better than low illuminance. Even if office is in high horizontal illuminance environment, employees brightness, satisfaction and productivity are not guaranteed.