condition	mean	min	max
4 h after light	4.862605	3.72466	6.00055
8 h after light	5.376225	4.79131	5.96114
12 h after light	17.1062	16.2134	17.999
4 h after dark	20.797233333333335	19.7007	21.6596
8 h after dark	23.2032	21.3649	24.5419
12 h after dark	13.504166666666666	10.617	15.258