condition	mean	min	max
4 h after light	6.6873700000000005	6.491169999999999	6.89043
8 h after light	6.678113333333333	6.49902	6.809
12 h after light	6.592003333333333	6.27609	6.89883
4 h after dark	6.4997533333333335	6.3173	6.79961
8 h after dark	6.65978	6.37774	6.859089999999999
12 h after dark	6.720253333333334	6.47889	6.951060000000001