RP spectra for spectral types in the UCD regime, from M7 to T6. The red lines are spectral type comparison objects, black lines represent the median RP spectrum of all UCD candidates in each spectral type, and the turquoise lines represent the MIOG simulations based on BT-Settl synthetic spectra. The conversion between effective temperatures and spectral types for the black and turquoise lines is done using the calibrations of Stephens et al. (2009).