An electric light controller which serves to connect and disconnect an electric lamp element load from a power source in such rapid-fire pseudorandom seuentiality that the electric lamp appears to the eye as an illusion simulating the fluctuant brightness variations inherent in a flickering flame produced...http://www.google.se/patents/US4253045?utm_source=gb-gplus-sharePatent US4253045 - Flickering flame effect electric light controller