condition	mean	min	max
4 h after light	3.8	3.8	3.8
8 h after light	11.2	8.9	13.5
12 h after light	21.3	13.5	29.1
4 h after dark	9.85	9.2	10.5
8 h after dark	9.7	5.7	13.7
12 h after dark	13.55	9.9	17.2