Fits to the energy distribution (right) and carbon lines (left) for all carbon‐dominated DQ white dwarfs in our SDSS sample. The ﹩ugriz﹩ photometric observations are represented by error bars, while the average model fluxes are shown by filled circles. The derived atmospheric parameters are indicated in each panel. We have applied for clarity a three‐point average window smoothing in the display of the spectroscopic data.