condition	mean	min	max
4 h after light	7.058936666666666	6.920319999999999	7.27445
8 h after light	6.838726666666667	6.649189999999999	7.025710000000001
12 h after light	6.71299	6.27966	6.953139999999999
4 h after dark	6.816903333333333	6.587289999999999	7.104589999999999
8 h after dark	6.9962100000000005	6.710539999999999	7.214930000000001
12 h after dark	6.779943333333334	6.72116	6.81124