condition	mean	min	max
4 h after light	6.143816666666667	6.102130000000001	6.21245
8 h after light	6.15257	6.05074	6.27341
12 h after light	6.1486366666666665	6.00411	6.23557
4 h after dark	6.09535	6.00049	6.22224
8 h after dark	6.112256666666667	6.07544	6.18319
12 h after dark	6.34199	6.19378	6.54251