condition	mean	min	max
0 h after light	18.436950000000003	17.6017	19.2722
4 h after light	15.5587	15.2034	15.914
8 h after light	19.27215	18.7755	19.7688
4 h after dark	21.37205	20.7932	21.9509
8 h after dark	18.664450000000002	17.2866	20.0423
12 h after dark	17.6651	17.479	17.8512