Anti-aircraft searchlights on wheels, throwing a beam of 800 million candlepower, are rolling from the General Electric plant into the U. ST army service. Of the same type being used in the defense of London against air raiders, these lamps are five feet in diameter. They are mounted with their own power units on rubber-tired trucks for swift movement, and their beams, reaching five and one-half miles into the sky, can be directed from side to side or up and down with the ease of steering an automobile. In a test, a newspaper twelve miles away was read by the light of one searchlight.