condition	mean	min	max
4 h after light	7.162913333333333	6.48367	7.60158
8 h after light	7.31794	6.762689999999999	7.708480000000001
12 h after light	7.384863333333333	6.654	7.880319999999999
4 h after dark	7.48163	6.801010000000001	7.84342
8 h after dark	7.303213333333333	6.76805	7.652419999999999
12 h after dark	7.30021	6.61706	7.663539999999999