condition	mean	min	max
4 h after light	6.50352	6.16973	6.74385
8 h after light	6.241903333333333	6.028630000000001	6.3629
12 h after light	6.36507	6.264959999999999	6.4749300000000005
4 h after dark	6.011393333333333	5.63438	6.29045
8 h after dark	6.060613333333333	5.66637	6.4222
12 h after dark	6.084836666666667	5.80861	6.40837