condition	mean	min	max
4 h after light	22.42175	18.2994	26.5441
8 h after light	16.60415	16.5336	16.6747
12 h after light	19.00565	18.6193	19.392
4 h after dark	12.950166666666666	12.7879	13.1243
8 h after dark	20.5956	20.0991	20.8844
12 h after dark	21.4563	18.9176	22.7855