Re: LDEW?
Ships to make serious use of lasers, especially the higher-powered ones that will follow this model, will obviously require substantial capacity to generate electricity while remaining underway. This could also be used in railguns, which will have an over-the-horizon capacity that lasers lack. Navies will need to work out and wargame the correct mix of these systems.
But without any experience of naval warfare, I can be sure that the ships bearing this potent combination of electrical weaponry into battle must be called Laser And Railgun Dreadnoughts.