The previous sections focused on the phosphorescence from the T1 minimum geometry. However, the vibrational freedom allows vibronic couplings that may impact the emission. We have seen in Section 4.4 that how strongly they impact depends on the molecule. For BA, for instance, vibronic couplings slightly reduced the phosphorescence lifetime from 4.6 to 2.97 ms; however, for DMABA, the lifetime at the minimum geometry, 114 ms, was reduced to 4.12 ms when the vibronic effects were included.