condition mean min max 0 h after light 0.0 0.0 0.0 4 h after light 0.1942365 0.0 0.388473 8 h after light 0.0 0.0 0.0 4 h after dark 0.0 0.0 0.0 8 h after dark 0.1940255 0.0 0.388051 12 h after dark 0.0 0.0 0.0