condition	mean	min	max
4 h after light	7.9	7.9	7.9
8 h after light	18.0	8.3	27.7
12 h after light	17.75	13.1	22.4
4 h after dark	36.35	4.9	67.8
8 h after dark	28.85	26.8	30.9
12 h after dark	13.5	3.8	23.2