condition	mean	min	max
4 h after light	6.898313333333333	6.698989999999999	7.0754399999999995
8 h after light	7.20497	7.03718	7.484430000000001
12 h after light	7.048863333333333	6.996289999999999	7.08126
4 h after dark	7.156773333333333	7.04218	7.2854
8 h after dark	7.1629700000000005	6.93533	7.30468
12 h after dark	6.958083333333334	6.79604	7.1017600000000005