circuit diagram: imageshack.us You can zoom into it for more detail ! 2 car ignition coils light driver circuit very_efficient_LED_driver part 6 In this Part 6 user kdkinen used 4 LED bulbs in parallel but powered by a 24 Volts source and he almost blew the LED bulbs so bright they have been. This is a unique 2 ignition coil one wire experiment design to light severals powerful LED light bulbs. The original video is from Youtube User: www.youtube.com who gave me permission to repost this on my channel, so more viewers will see it. He has build a darlington type oscillator with the primary of the first ingintion coil and this puts out a high voltage audio frequency range oscillation on the secondary of the first ignition coil. This is then fed via 1 wire only to the second ignition coil and thus reverse transformed down to about 12 Volts AC where it is fed to the 12 Volts LED light bulb. In part4 you saw, that the bulb stays on about 208 seconds all in all, but a 3 Watts light bulb should only stay on about 24 seconds from a about 72 Joules charge of the 1 Farad cap at 12 Volts.due to the formula: Energy= 0.5 x C x voltage^2 So it is lasting much longer than expected. So is this design using energy from the environment as it might pull free electrons from the ground connection into it and is thus overunity ? You deceide ! Many thanks to user: www.youtube.com ( MrClean) to allow me reposting this. Regards, Stefan.