Mean rest-frame SED of SMGs for four infrared luminosity bins, from bottom to top: L_IR < 10¹²   L_⊙; 10¹²   L_⊙ < L_IR < 10^12.7   L_⊙; 10^12.7   L_⊙ < L_IR < 10¹³   L_⊙ and 10¹³   L_⊙ < L_IR. The solid lines show the power-law temperature distribution SED corresponding to the mean dust mass and dust temperature of the bin. The photometry of each of the sources was slightly renormalized to match these SED templates at submm wavelengths. Dashed lines represent the CE01 template corresponding to the mean infrared luminosity of the bin, i.e., these templates were not fitted to the photometry of our SMGs.