condition	mean	min	max
4 h after light	6.5514399999999995	6.45264	6.613289999999999
8 h after light	6.334366666666666	6.2390099999999995	6.451219999999999
12 h after light	6.33138	6.22229	6.4166
4 h after dark	6.459573333333333	6.34796	6.5994
8 h after dark	6.371106666666667	5.95435	6.6002600000000005
12 h after dark	6.328116666666666	6.05077	6.6013399999999995