condition mean min max 4 h after light 5.772963333333333 5.73287 5.79753 8 h after light 5.812553333333333 5.72969 5.9528099999999995 12 h after light 5.640569999999999 5.58135 5.74076 4 h after dark 5.75207 5.70472 5.8095099999999995 8 h after dark 5.75667 5.70325 5.84547 12 h after dark 5.6784799999999995 5.56187 5.75305