Although productivity modules can’t be placed into beacons and transmitting efficiency is mostly a no brained. The combination of red building with yellow light seems better, then using a blue light.
But there are two animations indicating operation the light and the Tesla sparks. Or would definitely be nice if for example a power building is emitting energy and if modules are placed the light starts to glow. I would prefer it this way, to utilize the prominent light to quickly indicate a fully operational building even from afar.
Like in the current design the small radar dish is only spinning while powered, but communicating even more information.