The invention relates to a lighting apparatus for generating a light pattern. The first and second drift regions are respectively formed in the second and third regions at a first depth. The routers intercommunicate to force APS to switch data paths bidirectionally, so as to allow only a single router for each data path. The hydroforming fluid supply system provides pressurized fluid into an interior of the tube blank in order to expand the tube blank outwardly into conformity with the die cavity. 001 gcm3 higher than the density of the second population of cells. The method may include providing a group of pigtails.