condition mean min max 4 h after light 8.6945405 8.280597 9.108484 8 h after light 8.0797555 7.788868 8.370643 12 h after light 7.618441000000001 7.282002 7.95488 4 h after dark 8.73751 8.336108 9.138912 8 h after dark 9.446018500000001 8.336108 10.555929 12 h after dark 6.808157 6.808157 6.808157