condition	mean	min	max
4 h after light	7.59342	6.64984	8.537
8 h after light	5.651885	5.32951	5.97426
12 h after light	5.25192	4.7906	5.71324
4 h after dark	7.691055	6.87507	8.50704
8 h after dark	8.3351	7.84699	8.82321
12 h after dark	8.83174	8.64042	9.02306