condition	mean	min	max
4 h after light	6.722893333333333	6.48727	6.99919
8 h after light	6.593540000000001	6.5214	6.645060000000001
12 h after light	6.483583333333334	6.31489	6.7767800000000005
4 h after dark	6.575103333333333	6.45284	6.79447
8 h after dark	6.800886666666666	6.758089999999999	6.87765
12 h after dark	7.07332	6.99057	7.12533