condition	mean	min	max
4 h after light	1.6	1.6	1.6
8 h after light	21.45	19.0	23.9
12 h after light	5.65	5.0	6.3
4 h after dark	21.65	19.1	24.2
8 h after dark	16.3	1.7	30.9
12 h after dark	9.85	5.3	14.4