condition	mean	min	max
4 h after light	9.18527	8.63205	9.73849
8 h after light	8.482085	8.23913	8.72504
12 h after light	15.4002	13.5728	17.2276
4 h after dark	19.217399999999998	18.204	20.2308
8 h after dark	28.96395	27.1266	30.8013
12 h after dark	20.3928	19.7961	20.9895