An overview of the various aspects related to the transport of electronic excitation energy in columnar liquid crystals is presented. The different modes of transport (hopping or intrabande scattering) and their dependence on the type of electronic excited states (localised on single molecular discs or delocalised over a large number of them) are discussed. The influence of the structural disorder is examined. Some conclusions regarding the electronic structure of the molecular discs necessary to obtain efficient transport are drawn.