Dark lightning would appear to be an interesting phenomenon, but it probably does not involve quantum mechanics or the Pauli exclusion principle.
Last year, I posted a nearly identical question., and I received the following replyI've seen that question on here before a few times. It has come up relatively frequent. Interesting how everyone keeps coming to that conclusion! A good mathematical explanation is given at http://en.wikipedia.org/wiki/Identical_particles#Symmetrical_and_antisymmetrical_states.
Both of these Wikipedia articles are very helpful and responsive to the questions. Thank you HeavyMetal and tom.stoer.Anyway - it makes sense to start with http://en.wikipedia.org/wiki/Spin-statistics_theorem