This is just a quick question about the Astronomican. From what I understand the energy created is beamed out by the Emperor as psychic light across the galaxy making warp travel possible. That I know. Also, I know the Light fades towards the eastern fringes making this the frontier of the Imperium.
But I was wondering if the Astronomican would need a booster signal, say in each Segmentum there was a world, or number of worlds, that had infrastructure that acted as magnifier/booster of the signal? Or is the Light that strong that no such thing be needed?