def simtelSingleMirrorListFileName(
    site, telescopeModelName, modelVersion, mirrorNumber, label
):
    """
    sim_telarray mirror list file with a single mirror.

    Parameters
    ----------
    site: str
        South or North.
    telescopeModelName: str
        North-LST-1, South-MST-FlashCam, ...
    modelVersion: str
        Version of the model.
    mirrorNumber: int
        Mirror number.
    label: str
        Instance label.

    Returns
    -------
    str
        File name.
    """
    name = "CTA-single-mirror-list-{}-{}-{}".format(
        site, telescopeModelName, modelVersion
    )
    name += "-mirror{}".format(mirrorNumber)
    name += "_{}".format(label) if label is not None else ""
    name += ".dat"
    return name