def ToPhotlam(self, wave, flux, **kwargs):
        """Convert to ``photlam``.

        Since there is no real conversion necessary, this returns
        a copy of input flux (if array) or just the input (if scalar).
        An input array is copied to avoid modifying the input
        in subsequent **pysynphot** processing.

        Parameters
        ----------
        wave, flux : number or array_like
            Wavelength (not used) and flux values to be used for conversion.

        kwargs : dict
            Extra keywords (not used).

        Returns
        -------
        result : number or array_like
            Converted values.

        """
        if hasattr(flux,'copy'):
          return flux.copy()  # No conversion, just copy the array.
        else:
          return flux