For the linear dependent E L and ΔE HL , both L_Las05_RF and G_Las05_RF models independently identified nAtomP and R_TpiPCTPC as the important descriptors, the former one denoting the numbers of atoms in the largest π system and the latter denoting the ratio of total conventional bond order with total path count. These are straightforwardly consistent with the conventional chemical knowledge that a larger π system can result in lower E L energy. ETA_Beta_ns denotes the measure of electron-richness of the molecule. SubFPC287, as a similar descriptor like SubFPC300 identified for E H prediction, denotes the count of conjugated double bonds and poses a contribution of E H to the ΔE HL predictions.