condition	mean	min	max
4 h after light	18.07215	17.2405	18.9038
8 h after light	14.55035	13.8085	15.2922
12 h after light	15.806000000000001	15.7949	15.8171
4 h after dark	16.647666666666666	16.0306	17.1033
8 h after dark	19.6538	17.8807	21.3149
12 h after dark	17.437	15.9593	19.4037