condition	mean	min	max
4 h after light	6.300706666666667	6.10381	6.461530000000001
8 h after light	6.5030166666666664	6.37961	6.62387
12 h after light	6.54496	6.46903	6.62282
4 h after dark	6.84785	6.7393	6.93533
8 h after dark	6.52807	6.22299	6.7818
12 h after dark	6.475146666666666	6.31513	6.63887