condition	mean	min	max
4 h after light	6.484183333333333	6.458559999999999	6.519909999999999
8 h after light	6.60864	6.49627	6.7862800000000005
12 h after light	6.50629	6.41972	6.56265
4 h after dark	6.559333333333334	6.5246	6.603860000000001
8 h after dark	6.313693333333333	6.02341	6.50854
12 h after dark	6.647983333333333	6.5182400000000005	6.801010000000001