A method and apparatus to equalize the voltage across each light bulb in a low-voltage lighting system, commonly found in the yards of private homes and businesses. The present invention consists of a power compensation element that is inserted in-line with each light bulb connected to the bus lines...http://www.google.fr/patents/US7227314?utm_source=gb-gplus-shareBrevet US7227314 - Voltage equalization method and apparatus for low-voltage lighting systems
Voltage equalization method and apparatus for low-voltage lighting systems