condition	mean	min	max
4 h after light	4.1	4.1	4.1
8 h after light	23.55	6.2	40.9
12 h after light	9.15	6.9	11.4
4 h after dark	20.9	17.5	24.3
8 h after dark	13.8	9.8	17.8
12 h after dark	20.7	20.2	21.2