condition	mean	min	max
4 h after light	18424.219999999998	17228.98667	19139.28
8 h after light	15713.819443333334	14664.04	16604.12333
12 h after light	12708.28	11742.23	13692.55333
1.5 h after dark	12622.25778	12205.79667	12889.1
5.5 h after dark	17826.28889	17478.25	18339.82667
9.5 h after dark	18485.058886666666	18138.93	18718.88333