An LED illumination apparatus according to the present invention includes at least one connector and a lighting drive circuit. The connector is connected to an insertable and removable card-type LED illumination source, which includes multiple LEDs that have been mounted on one surface of a substrate....http://www.google.ca/patents/US20030189829?utm_source=gb-gplus-sharePatent US20030189829 - LED illumination apparatus and card-type LED illumination source
