condition	mean	min	max
4 h after light	6.929763333333334	6.9215100000000005	6.94141
8 h after light	6.60277	6.31369	6.90625
12 h after light	6.951076666666666	6.78452	7.081589999999999
4 h after dark	5.991383333333333	5.81201	6.30764
8 h after dark	6.164033333333333	6.06736	6.351030000000001
12 h after dark	6.31095	6.0936900000000005	6.4890099999999995