condition	mean	min	max
4 h after light	6.76853	6.5643	6.888319999999999
8 h after light	6.767903333333333	6.576639999999999	6.97895
12 h after light	6.590520000000001	6.40602	6.774660000000001
4 h after dark	7.00349	6.685560000000001	7.36055
8 h after dark	7.256866666666666	7.12064	7.50051
12 h after dark	7.28377	7.13725	7.497439999999999