AbstractThe first ME spectrum of pyrazine was measured as an excitation spectrum. Assuming the quantum yield to be constant over the spectrum it was considered as an absorption spectrum and de‐diagonalisation led to zero order energies and coupling constants of the singlet and triplet states. – By measuring the lifetimes of eight strong ME's we have now shown that the quantum yield varies by as much as a factor of three over the spectrum. With these lifetimes the excitation spectrum can be converted into a real absorption spectrum and a new and now correct set of values for the zero order energies, their widths and the coupling constants was obtained. The most important result is the fact that the zero order singlet and triplets decay non‐radiatively at different rates.