Luminosity structure of MESA set 2 models at ages of (top left) 2 Gyr and ages between (top right) 9.257, (bottom left) 9.653 and (bottom right) 11.644 Gyr. The blue curves correspond to the models without added heating; orange to those with heating as given by model 63; green to heating by ten times that given by model 63. The tidally heated models have surface luminosities that are larger than the nonheated models, but with lower luminosities in deeper layers.