Thermally activated delayed fluorescence (TDF) emission from C-70 and 1,2-C70H2 has been time-resolved to provide thermodynamic and kinetic information on excited electronic states. The energy gap between S-1 and T-1 states was deduced from the temperature dependence of initial TDF intensities and independently from the ratio of TDF intensity to time-integrated prompt fluorescence. S-1-T-1 gaps were found to be approximately 2470 cm(-1) for C-70 and 2180 cm(-1) for 1,2-C70H2, with relative uncertainties of 2-3%. Time-resolved TDF measurements from fullerene samples immobilized in PMMA films revealed lifetimes for triplet state decay unaffected by bimolecular deactivation processes. The intrinsic triplet lifetimes at 298 K were found from both TDF and transient absorption measurements to be 24.5 +/- 1.5 ms for C-70 and 1.95 +/- 0.1 ms for 1,2-C70H2.