However, the distribution B λ peaks at a different energy E = [ 5 + W ( − − 5 e − − 5 ) ] k B T ≈ ≈ 4.965 k B T , The reason for this is that, as mentioned above, one cannot go from (for example) B ν to B λ simply by substituting ν by λ. In addition, one must also multiply by | d ν ν / d λ λ | = c / λ λ 2 , which shifts the peak of the distribution to higher energies. These peaks are the mode energy of a photon, when binned using equal-size bins of frequency or wavelength, respectively. Dividing hc (14 387.770 μm·K) by these energy expression gives the wavelength of the peak.