condition	mean	min	max
4 h after light	6.5078000000000005	6.40486	6.595110000000001
8 h after light	6.892676666666667	6.80577	7.05448
12 h after light	6.801206666666666	6.701789999999999	6.90712
4 h after dark	6.69592	6.56665	6.76543
8 h after dark	6.346273333333333	6.31651	6.3807599999999995
12 h after dark	6.329926666666666	6.24126	6.3819