condition mean min max 4 h after light 6.357763333333334 6.23954 6.45708 8 h after light 6.4094299999999995 6.15194 6.5387699999999995 12 h after light 6.4254999999999995 6.318169999999999 6.53219 4 h after dark 6.4394833333333334 6.41562 6.48002 8 h after dark 6.441493333333334 6.42137 6.475280000000001 12 h after dark 6.41821 6.3618 6.51129