An LED light source can include protection members to protect bonding wires. The support member includes integral slider tracks disposed on opposed sidewalls for selective engagement with a translatable cowl. In this configuration, the press plate of the retaining apparatus presses against and secures the heat sink. In this regard, interference of a laser beam can be decreased by setting the angle of incidence of the laser beam with respect to the surface of the semiconductor film is to be a desired angle other than 0\xb0.