condition	mean	min	max
4 h after light	6.633356666666667	6.463019999999999	6.892510000000001
8 h after light	6.54269	6.44912	6.64531
12 h after light	6.4985566666666665	6.302569999999999	6.62218
4 h after dark	6.67473	6.31401	7.057180000000001
8 h after dark	6.389123333333334	6.3741900000000005	6.41385
12 h after dark	6.63302	6.44003	6.88709