condition	mean	min	max
4 h after light	17.8679	17.7243	18.0115
8 h after light	21.51405	21.0302	21.9979
12 h after light	13.662199999999999	12.0353	15.2891
4 h after dark	13.33205	11.8588	14.8053
8 h after dark	10.46345	10.4108	10.5161
12 h after dark	19.929650000000002	17.8827	21.9766