condition	mean	min	max
4 h after light	6.201943333333333	5.91896	6.37879
8 h after light	6.207443333333333	6.06152	6.3554699999999995
12 h after light	6.067783333333333	5.94231	6.14942
4 h after dark	6.2744100000000005	6.14198	6.49
8 h after dark	6.29377	6.15177	6.57605
12 h after dark	6.249156666666667	6.14114	6.37327