Histograms showing the (a) fractional infrared luminosity and (b) grain temperature distributions of Spitzer IRS debris disks that are well characterized using blackbody models. The black histogram shows the distribution for objects that are better fit using a one-temperature model; the median grain temperature T _gr = 180 K. The blue and red histograms show the distributions of the cold and warm components, respectively, for objects that are better fit using a two-temperature model; the median grain temperatures for the cold and warm components are T _gr = 80 and 340 K, respectively.