This research project is based on domestic characteristics in Taiwan to investigate and analyze the public light pollution. It would affect the degree of people feeling of awareness and comfort and would provide related suggestions of prevention and control of light pollution. Reviews of the relevant light pollution regulations and analyses of the current petition cases, this research focuses on two major light pollution sources to investigate the subjective perception of glare and flicker for LED combo lamp and LED multimedia. The main tasks include: (1) perform subjective evaluation of glare and flicker at night condition to build up the borderline between comfort and discomfort (BCD) of human perception for both light sources of LED combo in laboratory and LED billboard in outdoor environment; (2) conducting field surveys and proven measurement methods of outdoor advertising signs to propose the standard operation procedure ; (3) propose predictive improvement and management programs for various light sources including LED combo and LED multimedia according to the international regulations and domestic situation. First, this study made summary and translation of 3 literatures about light pollution. Second, this work conducted 204 measurements of static luminance and 144 measurements of time-varied illuminance for the selected LED combo light source, a total of 348 measurements. Third, the experiments have conducted for BCD of light pollution in laboratory. The questionnaire included the maximum glare and the maximum flicker. The independent variables included 13 luminance levels (447 cd/m²~168,641 cd/m²), 12 frame rate (0.125 frame/s~1,000 frame/s) of LED combo, and 4 patterns. There were 20 participants involved and total of 6,000 data were recorded. Fourth, there were 9 videos used for the outdoor LED multimedia visual comfort experiment. A total of 24 participants took part in this field experiments in the atrium of the Management School of Tunghai University, Taichung, Taiwan, and a total of 1,561 subjective questionnaires were collected. Fifth, based on 778 petition cases of light pollution, the types of light pollution in 2013 to 2015 in 22 counties and cities were analyzed. Sixth, the luminance and illuminance monitoring of the LED billboards in six locations in New Taipei City and the total number of measurement experiments was 198 times. This research revised a draft of luminance measuring method, a draft of vertical illuminance measuring method for dynamic light sources. In addition, there were divided into different stages to practice the prevention strategies of light pollution in accordance with urgency, feasibility and technical completeness based on domestic status and results in this study. Final, one control plant was suggested for the prevent control and management of light pollution.

light pollution，glare，flicker，LED combo