condition	mean	min	max
4 h after light	21.6	21.6	21.6
8 h after light	11.7	11.5	11.9
12 h after light	11.9	8.8	15.0
4 h after dark	8.0	3.0	13.0
8 h after dark	14.3	13.0	15.6
12 h after dark	9.3	8.1	10.5