Light curves for the standard case, for the standard case with radiative cooling, and for the standard case without thermal conduction. As expected, radiative cooling has very little effect for the chosen loop parameters. Conductive cooling (and leakage), on the other hand, plays a very important role during the whole relaxation phase. Top panel: light curves in the 3−6 keV range. Bottom panel: light curves in the 12−25 keV range.