But didn't we prove that most of the energy was wasted? By that logic, you say that the wasted energy isn't capable of destruction? I'm trying to give you this idea, in terms of total power exerted, the halos are more powerful, but [i]might [/i] be less destruction mass wise (you only calculate for a single species, there are hundreds of thousands on earth alone . since you fail to calculate, or estimate for animals/nature, your conclusion is far smaller then what it should be.) [spoiler][b][i][u]that's what I'm trying to say [/u][/i][/b][/spoiler] But in terms of power, imagine if the forerunners designed a weapon based for maximum destruction on the power scale of the halos. They even have a ship class called "planet-breakers" although much isn't said about this class of ship, it's safe to assume they have that name for a reason. And unlike star wars, the forerunners can mass produce these ships with planetary destructive capabilities.