- last post: 01.01.0001 12:00 AM PDT
From The Flood:
Spark bobbed slightly. "Of course," the construct said directly. Then, sounding more like his officious self again, "This installation has a maximum effective radius of twenty-five thousand light years, but once the others follow suit, this galaxy will be quite devoid of life, or at least any life with sufficient biomass to sustain the Flood.
My xbox isn't hooked up at this very moment, so I can't go to check, but 343 Guilty Spark also says that anything with sufficient cognitive ability within 3 radii of the galactic center will be killed by the Halos.
Now, our galaxy has a radius of ~50,000 lightyears. This means that 3 galactic radii would be ~150,000 lightyears from the center of our galaxy. Unless the other 6 Halos have vastly different firing ranges, when more than 1 Halo is activated, they must have some synergistic effect on each other, amplifying the blast to extend much farther than normal. If we assume this, then even if 1 Halo is destroyed, there's a very good chance that the entire galaxy will still feel the effect of the Halos' weapon - this includes Earth.