condition	mean	min	max
4 h after light	8.142405	7.21125	9.07356
8 h after light	7.18346	6.64622	7.7207
12 h after light	8.443585	8.33942	8.54775
4 h after dark	13.1522	12.8865	13.4179
8 h after dark	19.755499999999998	19.5367	19.9743
12 h after dark	17.270049999999998	16.8067	17.7334