condition	mean	min	max
4 h after light	6.780576666666667	6.67364	6.8876100000000005
8 h after light	6.78272	6.44284	7.02818
12 h after light	7.008626666666666	6.937360000000001	7.080369999999999
4 h after dark	7.041143333333333	6.6644	7.365480000000001
8 h after dark	7.008923333333334	6.944389999999999	7.059760000000001
12 h after dark	6.811646666666666	6.70914	6.956189999999999