condition	mean	min	max
4 h after light	6.348073333333334	6.22978	6.41385
8 h after light	6.285586666666667	6.10921	6.46473
12 h after light	6.59809	6.40527	6.82499
4 h after dark	6.630486666666666	6.30561	6.810339999999999
8 h after dark	6.79305	6.578130000000001	7.143439999999999
12 h after dark	6.61926	6.48379	6.84845