condition	mean	min	max
4 h after light	19.598135499999998	18.117513	21.078758
8 h after light	14.853172	11.646521	18.059823
12 h after light	20.531181	19.546644	21.515718
4 h after dark	19.546644	19.546644	19.546644
8 h after dark	19.509078000000002	17.906143	21.112013
12 h after dark	16.798957	16.798957	16.798957