E e,λ = d E e (λ) dλ MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdh9vqqj=hEeea0xXdbb a9frFj0=OqFfea0dXdd9vqaq=JfrVkFHe9pgea0dXdar=Jb9hs0dXd bPYxe9vr0=vr0=vqpWqaaeaaciWacmGadaGadeaaeaGaauaaaOqaai aadweadaWgaaWcbaGaaeyzaiaacYcacqaH7oaBaeqaaOGaeyypa0Za aSaaaeaacaGGKbGaamyramaaBaaaleaacaqGLbaabeaakiaacIcacq aH7oaBcaGGPaaabaGaaiizaiabeU7aSbaaaaa@44F4@
Note 1 to entry: The spectral irradiance is expressed in watt per square metre per nanometre (W·m−2·nm−1).