code: def sapm_effective_irradiance(poa_direct, poa_diffuse, airmass_absolute, aoi,
                                module, reference_irradiance=1000):
      
  
      F1 = sapm_spectral_loss(airmass_absolute, module)
      F2 = sapm_aoi_loss(aoi, module)
  
      E0 = reference_irradiance
  
      Ee = F1 * (poa_direct*F2 + module['FD']*poa_diffuse) / E0
  
      return Ee
docs: Calculates the SAPM effective irradiance using the SAPM spectral
      loss and SAPM angle of incidence loss functions.
  
      Parameters
      ----------
      poa_direct : numeric
          The direct irradiance incident upon the module.
  
      poa_diffuse : numeric
          The diffuse irradiance incident on module.
  
      airmass_absolute : numeric
          Absolute airmass.
  
      aoi : numeric
          Angle of incidence in degrees.
  
      module : dict-like
          A dict, Series, or DataFrame defining the SAPM performance
          parameters. See the :py:func:`sapm` notes section for more
          details.
  
      reference_irradiance : numeric, default 1000
          Reference irradiance by which to divide the input irradiance.
  
      Returns
      -------
      effective_irradiance : numeric
          The SAPM effective irradiance.