condition	mean	min	max
4 h after light	6.1738	6.08564	6.22875
8 h after light	6.43811	6.33707	6.55095
12 h after light	6.335606666666667	6.23674	6.38919
4 h after dark	6.43703	6.26658	6.666989999999999
8 h after dark	6.42821	6.33565	6.51783
12 h after dark	6.264336666666667	6.24795	6.2817