condition	mean	min	max
0 h after light	18.063299999999998	17.0579	19.0687
4 h after light	6.92957	6.17022	7.68892
8 h after light	6.690860000000001	6.46405	6.91767
4 h after dark	9.537475	9.10058	9.97437
8 h after dark	11.706900000000001	11.4731	11.9407
12 h after dark	13.91055	11.7558	16.0653