condition	mean	min	max
4 h after light	6.35093	6.29115	6.3872800000000005
8 h after light	6.56284	6.522869999999999	6.592969999999999
12 h after light	6.688106666666667	6.47219	6.8017199999999995
4 h after dark	6.862073333333333	6.815410000000001	6.95402
8 h after dark	6.75448	6.727460000000001	6.80426
12 h after dark	6.7544	6.623130000000001	6.831460000000001