condition	mean	min	max
4 h after light	6.760356666666667	6.71715	6.79782
8 h after light	6.8273633333333335	6.6979	7.005
12 h after light	6.59379	6.388	6.73488
4 h after dark	6.68739	6.50701	6.783189999999999
8 h after dark	6.667833333333333	6.42632	6.86498
12 h after dark	6.68733	6.50396	6.81177