condition	mean	min	max
4 h after light	6.561979999999999	6.3141099999999994	6.789039999999999
8 h after light	6.68887	6.51777	6.9496
12 h after light	6.59579	6.4572199999999995	6.69825
4 h after dark	6.577296666666666	6.38281	6.827189999999999
8 h after dark	6.45796	6.332330000000001	6.59115
12 h after dark	6.45321	6.32496	6.59377