Study On University Classroom Lighting Based On Self-dimming

Supported by National Natural Science Fund Project "Light environment of theclassroom research on bio-security"(Grant No.51178483), this paper has researched onthe advantage of dynamic light environment based on the artificial light integratedmodel which has been established; Through the subjects’independent dimming mode ofthe LED light source, the ranges of light colour temperature and light intensity areextended; It studied the factors which could have an effect on human preferences forcolor temperature, light intensity; Then it can provide reasonable suggestions for theestablishment of a reasonable dynamic light environment and can improve thecomprehensive model of artificial light as the basic research.First, the paper introduces the research trends of the classroom dynamic lightenvironment at home and abroad and analyzes the advantages and disadvantages ofLED lighting used in the classroom and the classroom lighting requirements of variousindicators on the basis of a large number of research papers of relevant research at homeand abroad.Finally, it is determined the main issues and the direction of research in thispaper. Namely, by dimming of light environment for subjective preferences, samplingthe light environmental data,then the paper evaluates the light environmental data.This paper is divided into two parts, including three tests: The first part is thecomparison experiment on students’learning performance under the static LED lightenvironment and the dynamic light environment; The second part is multi-sampledimming experiment of the subjective preferences for the LED light environment; Thethird part is the dimming experiment of the subjective preferences in seperate timethroughout the day,and collecting mood Scale, KSS scale, attention rating scale,physiological indicators and other data; Finally, it can provide reasonable suggestionsfor the research on the lighting environment of the universities’classrooms and theartificial light hybrid model of dynamic light environments based on the analysis resultsof the data which is from scales and index evaluation.Parts of the comparison of students’learning performance between the static lightenvironment with the dynamic light environment: Under LED light source, aftercomparing students’physical, mental, performance indicators under static and dynamiclight environment, the paper verifies the advantages of dynamic light environment.Parts of independent dimming experiment: Under LED light source, the light environment data of students’subjective preference has been collected. The factorswhich effect the color temperature and illumination that the students preferred wereanalysed.The method to filter the color temperature and illumination has been explored.Parts of attention Scale Evaluation: by evaluating a variety of scales, it valuesstudent subjective preference for light environment and observes the influence of mood,sleepy, physiological indicators for students’ subjective preference for lightenvironment.Through the above experimental study, at last in the paper for the entireexperimental process is reviewed and summarized under the comprehensive analysis ofa classroom full of artificial LED light environment, the relation with students’preference of light natural light environment outdoor, restrictions of experimentallighting, circadian rhythms, gender differences and attention evaluation indicators. Itcan provide evidence for improving artificial light integrated model and Establishmentof natural light-artificial light integrated model.It also can provide reasonable basis forthe establishment of hybrid dynamic environment of Skylight-artificial light.