condition	mean	min	max
4 h after light	7.16719	6.99167	7.26991
8 h after light	7.2316633333333336	7.224	7.24538
12 h after light	7.01562	6.8845600000000005	7.0839300000000005
4 h after dark	7.475020000000001	7.32932	7.579680000000001
8 h after dark	7.454403333333333	7.309419999999999	7.549989999999999
12 h after dark	7.44994	7.41012	7.50281