condition	mean	min	max
4 h after light	9.904875	8.38045	11.4293
8 h after light	18.27455	17.202	19.3471
12 h after light	19.294449999999998	18.7574	19.8315
4 h after dark	21.91766666666667	20.9018	23.1674
8 h after dark	13.7813	13.6062	14.0041
12 h after dark	11.157733333333335	10.944	11.4562