condition	mean	min	max
4 h after light	1.68976	1.57747	1.80205
8 h after light	6.500395	6.42647	6.57432
12 h after light	36.0608	34.8229	37.2987
4 h after dark	37.6541	36.5344	38.7738
8 h after dark	18.8557	18.4944	19.217
12 h after dark	6.803635	6.71486	6.89241