condition mean min max 4 h after light 4.71546 2.3651 7.31285 8 h after light 6.16161 2.53987 8.6188 12 h after light 8.46436 5.64423 10.6578 4 h after dark 8.437996666666667 7.71754 9.01399 8 h after dark 8.206479999999999 6.85465 9.10609 12 h after dark 5.373943333333333 4.14604 6.3866