condition	mean	min	max
4 h after light	17.8	17.8	17.8
8 h after light	4.15	3.5	4.8
12 h after light	6.35	6.2	6.5
4 h after dark	10.75	9.7	11.8
8 h after dark	5.8	3.9	7.7
12 h after dark	5.55	5.0	6.1