condition	mean	min	max
0 h after light	8.58662	8.3603	8.81294
4 h after light	8.55546	8.31457	8.79635
8 h after light	18.0817	15.5632	20.6002
4 h after dark	17.18055	15.1938	19.1673
8 h after dark	10.001190000000001	8.53668	11.4657
12 h after dark	7.6293500000000005	7.6059	7.6528