condition	mean	min	max
4 h after light	19.690765499999998	17.113214	22.268317
8 h after light	16.8373205	16.149435	17.525206
12 h after light	16.050467	14.675581	17.425353
4 h after dark	15.992902	15.446809	16.538995
8 h after dark	15.4100515	13.573317	17.246786
12 h after dark	15.401153	15.401153	15.401153