condition	mean	min	max
4 h after light	6.187846666666667	5.98533	6.36707
8 h after light	6.4151533333333335	6.2503400000000005	6.57195
12 h after light	6.419443333333334	6.25215	6.68525
4 h after dark	6.09634	6.01729	6.18358
8 h after dark	6.06538	5.79177	6.252730000000001
12 h after dark	5.89236	5.67857	6.21973