condition	mean	min	max
4 h after light	6.510356666666667	6.2478	6.89118
8 h after light	6.623623333333334	6.40148	6.950089999999999
12 h after light	6.634176666666666	6.58805	6.70344
4 h after dark	6.902380000000001	6.690510000000001	7.26492
8 h after dark	6.77591	6.57561	6.9743
12 h after dark	6.7958099999999995	6.65307	6.9793199999999995