condition mean min max 4 h after light 8.725342000000001 8.235433 9.215251 8 h after light 7.715585 7.413686 8.017484 12 h after light 9.5542805 8.322675 10.785886 4 h after dark 8.3901585 7.561405 9.218912 8 h after dark 7.744202 7.729229 7.759175 12 h after dark 8.322675 8.322675 8.322675