condition	mean	min	max
4 h after light	6.163336666666666	6.03635	6.2903199999999995
8 h after light	6.159673333333333	5.8488	6.42232
12 h after light	6.29978	6.0086	6.57074
4 h after dark	6.40613	6.17159	6.805910000000001
8 h after dark	6.549096666666666	6.23801	6.948239999999999
12 h after dark	6.371263333333333	6.13771	6.5777600000000005