You would either set up a Blueprint that toggles lights and switches materials at the same time or set up light functions with a flicker and use the same flickering math for the emissive materials. You would still need a little bit of Blueprint just to toggle everything on and off and probably set your global parameter for the flicker so they start at the same position/time.
Whether you use spots or points is really up to you and the type of affect you want. Points would suffice for the small lights around the light fixtures, but you’d be better off using spots for any sort of large-scale lighting if you wanted them to hit nearby walls.