Based on the domestic conditions of Taiwan, this project aims to investigate and analyse the impacts of staturoty nuisance from artificial light, and then to propose the related tactics and recommendations. Through survey of the relevant regulations and scientific literatures and collection of pleader cases. This research focuses on both perception of glare and flicker. The main tasks include: (1) measurements of light pollution source, (2) study on the borderline between comfort and discomfort (BCD) of human perception and cognitions to perform subjective evaluation of glare and flicker at night condition, (3) case study of the background luminance and illumination level impacts on measuring resultants, and (4) proposal of prevention and management program of light pollution according to the international regulations and domestic status.
First, this study made summary and translation above 26 literatures. Second, this work conducted 132 measures for the selected LED billboard, analyzed the changes in the brightness of the light source and frequency domain analysis for 10 motion pictures, used dynamic imaging luminance measurement device to measure 10 testing videos at varied brightness of LED billboards. Third, the experiments have conducted for BCD of light pollution. The questionnaire included the maximum glare and the maximum flicker. The independent variables included the luminance of LED (1000 cd/m2 and 5000 cd/m2), the dose (~60 sec, ~120 sec, and ~180 sec) and 10 motion pictures. There were 20 participants involved and 1200 data were recorded. Results revealed that:
1) For the percevied maximun glare, four main effects of luminance of LED, video type, age and gender were significant. The luminance level of LED and video were more serious.
2) For the percived maximum flicker, three main effects of luminance of LED, dose and video were significant. However, the means of 3 dose leves were close.
3) Comparing with the previous study, this study develops a glare predition model and lists a luminace recommendation table of glare for motion pictures.
4) Comparing with the previous study, this study develops a flicker predition model and lists a frequency magnitude recommendation table of flicker for motion pictures as well.
Meanwhile, this study conducted a total of 4 case studies of monitoring the luminance of LED billboards, vertical and horizontal illuminance in Taipei metropolitan area and Hsinchu downtown area. Then we proposed a draft of luminance measuring method, a draft of vertical illiminance measuring method and a draft of UGR and flicker index 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, three directions of general guidelines, requlatory compliance and behavior control were suggested for the prevent control and management of light pollution.