condition	mean	min	max
4 h after light	21.7	21.7	21.7
8 h after light	21.25	19.0	23.5
12 h after light	4.0	2.2	5.8
4 h after dark	18.15	6.9	29.4
8 h after dark	25.9	17.3	34.5
12 h after dark	8.9	3.0	14.8