condition	mean	min	max
4 h after light	20.0768	19.1987	20.9549
8 h after light	7.40242	6.24972	8.55512
12 h after light	7.88939	5.69918	10.0796
4 h after dark	7.526045	7.47204	7.58005
8 h after dark	8.079995	7.42295	8.73704
12 h after dark	17.2667	12.415	22.1184