Ball Lightning – Source of Free Quantum Energy Abstract By Dr Kiril Chukanov, U.S.A./Canada The phenomenon of ball lightning still remains one of the greatest and unsolved mysteries in the physics. This unusual phenomenon doesn’t attract serious attention of contemporary physicists because nobody expects to realize benefit for mankind from understanding and practical use of ball lightning. On another hand, to reproduce a natural phenomenon under controlled conditions requires a clear understanding of what, exactly, the natural phenomenon is. During long period of time (about 23 years) Dr Kiril Chukanov created numerous experimental set-ups for investigating physical and energy features of ball lightning. In parallel with his experimental work, Kiril Chukanov developed and improved the theoretical model of ball lightning. According to Dr Kiril Chukanov, ball lightning represents giant macro-atom. The quantum macro-nucleus of ball lightning is a positively charged two- dimensional unit. An electron shelf (cloud) surrounds this giant nucleus. In his experiments Dr Kiril Chukanov demonstrated the unusual quantum behavior of ball lightning: quantum trespassing through wall (ceramic, paper, others), incredible elasticity under deep vacuum, quantum nature of ball lightning’s surface, etc. The most intriguing/practical feature of ball lightning is its ability to produce free quantum energy under some quantum conditions. Quantum Free Energy (QFE) from artificially created ball lightning is new, unlimited, safe, and very cheap source of energy. Since 2006 Dr Kiril Chukanov works on the creation of industrial powerful QFE generators for business. Now, February 2008, the first commercial QFE generator (from ball lightning) is ready. The over-unity of this generator is very high (tens of times). The spectrum of practical applications of QFE (from ball lightning) includes: unlimited source of free energy (no fuel or any other primary energy source), source of very energetic photons (UV, X-rays, and gamma-photons), nano-technologies, very powerful lasers, military applications.