condition	mean	min	max
4 h after light	6.561786666666667	6.46995	6.705030000000001
8 h after light	6.5255600000000005	6.31426	6.7237100000000005
12 h after light	6.76436	6.5707699999999996	6.8821
4 h after dark	6.523573333333333	6.38054	6.647469999999999
8 h after dark	6.500826666666667	6.29756	6.6185
12 h after dark	6.61284	6.50906	6.7061