condition	mean	min	max
4 h after light	6.373763333333334	6.28576	6.5306
8 h after light	6.25945	6.22696	6.2922
12 h after light	6.1950666666666665	6.08749	6.3211900000000005
4 h after dark	6.31666	6.06174	6.59713
8 h after dark	6.4576633333333335	6.29108	6.74252
12 h after dark	6.26259	6.182180000000001	6.36163