code: def e():
      
      lmbda = 1.0e-9 * numpy.arange(300, 831)
      data = numpy.full(lmbda.shape, 100.0)
      return lmbda, data
docs: This is a hypothetical reference radiator. All wavelengths in CIE
      illuminant E are weighted equally with a relative spectral power of 100.0.