condition	mean	min	max
4 h after light	11.9	11.9	11.9
8 h after light	23.0	18.5	27.5
12 h after light	18.5	16.2	20.8
4 h after dark	11.3	7.6	15.0
8 h after dark	26.05	19.5	32.6
12 h after dark	21.85	14.1	29.6