condition mean min max 4 h after light 5.67784 5.50723 5.7832300000000005 8 h after light 5.51192 5.389959999999999 5.6367400000000005 12 h after light 5.84149 5.68058 5.94161 4 h after dark 6.192526666666667 6.13279 6.310969999999999 8 h after dark 6.265266666666666 6.23422 6.31431 12 h after dark 6.289183333333334 6.14885 6.38818