condition	mean	min	max
4 h after light	18.6169	18.5463	18.6875
8 h after light	11.60155	11.5264	11.6767
12 h after light	7.08331	6.93163	7.23499
4 h after dark	7.694015	6.49881	8.88922
8 h after dark	2.1559	2.07204	2.23976
12 h after dark	4.44314	4.01807	4.86821