condition	mean	min	max
4 h after light	6.302003333333333	6.19537	6.38861
8 h after light	6.322666666666667	5.89403	6.567080000000001
12 h after light	6.335053333333334	6.10439	6.5160800000000005
4 h after dark	6.636063333333333	6.19838	6.900510000000001
8 h after dark	6.40194	6.27233	6.49376
12 h after dark	6.032590000000001	5.96705	6.114330000000001