condition	mean	min	max
4 h after light	3.925415	3.82428	4.02655
8 h after light	11.185749999999999	10.8445	11.527
12 h after light	17.24785	16.8153	17.6804
4 h after dark	18.9328	17.6529	20.2127
8 h after dark	11.7275	11.2448	12.2102
12 h after dark	7.84144	7.76013	7.92275