condition	mean	min	max
4 h after light	3.3	3.3	3.3
8 h after light	2.55	1.9	3.2
12 h after light	5.15	3.9	6.4
4 h after dark	9.15	7.7	10.6
8 h after dark	16.55	6.6	26.5
12 h after dark	24.9	11.2	38.6