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

Table 6

Large probability distribution of brightness comparison data.

Brightness	300 cd/m^2	400 cd/m^2	500 cd/m^2	600 cd/m^2	700 cd/m^2	800 cd/m^2
Average brightness contrast	15 : 1	5 : 1	10 : 1	15 : 1	20 : 1	30 : 1