condition	mean	min	max
4 h after light	6.8964099999999995	6.77725	7.011489999999999
8 h after light	6.63861	6.53775	6.78719
12 h after light	6.65242	6.61327	6.68675
4 h after dark	6.8076300000000005	6.69573	6.906560000000001
8 h after dark	6.910903333333334	6.7918	7.09749
12 h after dark	6.873883333333334	6.73002	6.97893