condition mean min max 4 h after light 9.0559205 9.029171 9.08267 8 h after light 10.4045215 9.583058 11.225985 12 h after light 8.627084 8.305905 8.948263 4 h after dark 9.0687185 8.751441 9.385996 8 h after dark 8.7507195 8.553176 8.948263 12 h after dark 7.986423 7.986423 7.986423