Methods and structures for a composite truss structure are provided. The pattern can be a phased pattern, such as a spiral pattern, a triphase pattern, and so forth. An illuminant epitaxial structure is provided, in which the illuminant epitaxial structure has a first surface and a second surface on opposite sides, and a substrate is deposed on the first surface of the illuminant epitaxial structure. The guide rails are fixed in a substantially parallel relationship at a fixed spacing substantially equal to the spacing between the rollers.