condition	mean	min	max
4 h after light	7.8156300000000005	5.93438	9.69688
8 h after light	5.39317	5.31352	5.47282
12 h after light	8.019955	7.97692	8.06299
4 h after dark	15.3535	14.5364	16.1706
8 h after dark	19.55885	18.7917	20.326
12 h after dark	14.517399999999999	14.238	14.7968