Ping the lamps by issuing a short inversion blink to all available devices.

    CLI Example:

    .. code-block:: bash

        salt '*' hue.ping

def call_ping(*args, **kwargs):
    '''
    Ping the lamps by issuing a short inversion blink to all available devices.

    CLI Example:

    .. code-block:: bash

        salt '*' hue.ping
    '''
    errors = dict()
    for dev_id, dev_status in call_blink().items():
        if not dev_status['result']:
            errors[dev_id] = False

    return errors or True