condition mean min max 0 h after light 0.177711 0.0 0.355422 2 h after light 0.0 0.0 0.0 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 2 h after dark 0.0 0.0 0.0 4 h after dark 0.0944745 0.0 0.188949 8 h after dark 0.203397 0.0 0.406794 12 h after dark 0.0 0.0 0.0