condition	mean	min	max
4 h after light	7.903075	7.52458	8.28157
8 h after light	6.2972649999999994	6.2879	6.30663
12 h after light	6.445545	6.13011	6.76098
4 h after dark	12.98025	12.5669	13.3936
8 h after dark	17.811999999999998	17.5746	18.0494
12 h after dark	15.33735	14.5105	16.1642