condition	mean	min	max
4 h after light	6.3374	6.01149	6.54509
8 h after light	6.5727866666666666	6.4270000000000005	6.7845
12 h after light	6.3321000000000005	5.8384	6.62997
4 h after dark	6.675353333333333	6.55225	6.773039999999999
8 h after dark	6.5397533333333335	6.503480000000001	6.58208
12 h after dark	6.617746666666667	6.560569999999999	6.693960000000001