condition	mean	min	max
0 h after light	21.827350000000003	20.6459	23.0088
4 h after light	8.14453	7.51543	8.77363
8 h after light	13.44275	12.5011	14.3844
4 h after dark	17.36725	15.5272	19.2073
8 h after dark	15.92075	14.5975	17.244
12 h after dark	20.309849999999997	18.0647	22.555