[Retracted] The Evaluation of Visual Clarity and Comfort of Light Environment in Multimedia Classroom

Table 5

Calculation table of threshold limit value of visual comfort brightness change data.

Scoring frequency/percentage	Brightness parameters
	300 cd/m^2	400 cd/m^2	500 cd/m^2	600 cd/m^2	700 cd/m^2	800 cd/m^2
≥4 percentage	53.76	94.62	87.1	23.65	13.98	2.15
≤2 percentage	1.08	3.23	7.53	22.58	43.01	74.19