condition	mean	min	max
4 h after light	6.37073	6.18651	6.5461800000000006
8 h after light	6.297736666666666	6.13441	6.59094
12 h after light	6.203603333333334	6.03167	6.37415
4 h after dark	6.016616666666667	5.75	6.17926
8 h after dark	6.184403333333333	6.11538	6.2413099999999995
12 h after dark	6.27395	6.1563099999999995	6.45173