Why do the Vasudans and Terrans use completely different beam technology? Minor differences in the construction of the weapon would result in the color differences, so its not really nessecary that Vasudan beams and Terran beams use a different technology base, although i suppose that depending on how different the underlying principles that the power grids on the ships are built with might have some effect, beyond a certain point power is just power. you may need a converter to use US electric appliances in Europe, but its not like you need an electric razor that operates on a completely different set of principles.