The modular track luminaire system of the present invention is a modular lighting system which has a lighting unit which is electronically connected to a remote ballast housing by a removable and reattachable insulated cord and plug system, the luminaire unit electrically connected to the ballast housing...http://www.google.com/patents/US7513675?utm_source=gb-gplus-sharePatent US7513675 - Modular luminaire system with track and ballast attachment means
