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

Table 4

Calculation table of threshold limit value of visual clarity 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	4.3	68.82	94.62	37.64	3.23	0
≤2 percentage	48.39	3.22	0	22.58	76.34	98.92