condition	mean	min	max
4 h after light	3.371665	2.51647	4.22686
8 h after light	2.28715	1.83462	2.73968
12 h after light	1.946085	1.67301	2.21916
4 h after dark	9.208	8.77373	9.64227
8 h after dark	4.923765	4.76315	5.08438
12 h after dark	7.194585	6.49289	7.89628