condition	mean	min	max
4 h after light	15.3862	14.2178	16.5546
8 h after light	18.52785	17.5828	19.4729
12 h after light	20.4876	17.7115	23.2637
4 h after dark	22.471	21.3599	23.5821
8 h after dark	21.345399999999998	20.0805	22.6103
12 h after dark	19.65235	19.1138	20.1909