condition	mean	min	max
4 h after light	6.6448366666666665	6.533980000000001	6.84628
8 h after light	6.654649999999999	6.4276599999999995	6.91897
12 h after light	6.636963333333334	6.43403	6.965510000000001
4 h after dark	6.6653400000000005	6.50899	6.86003
8 h after dark	6.68262	6.48332	6.91511
12 h after dark	6.58552	6.35595	6.756539999999999