Lasing threshold in traps for Bose-condensation of dipolar excitons

► We consider recombination lasing on excitons undergoing Bose-Einstein condensation. ► Lasing threshold lowers considerably under the conditions of BEC formation in 2D trap. ► This lowering takes place not with the onset of BEC condensation, but even before it. ► Very low Q-factor of order 300 is sufficient for lasing in typical exciton BEC traps. ► Recombination lasing is achievable in nowadays experiments on exciton condensation.