condition	mean	min	max
4 h after light	6.50492	6.36576	6.649780000000001
8 h after light	6.620293333333334	6.57322	6.69477
12 h after light	6.55279	6.39965	6.70609
4 h after dark	6.735133333333334	6.50807	6.99178
8 h after dark	6.611843333333333	6.50106	6.74569
12 h after dark	6.63326	6.5049	6.7342699999999995