condition	mean	min	max
4 h after light	14.6	14.6	14.6
8 h after light	18.5	7.0	30.0
12 h after light	15.15	12.7	17.6
4 h after dark	8.4	1.2	15.6
8 h after dark	13.55	3.8	23.3
12 h after dark	11.4	1.5	21.3