A ceramic metal halide lamp includes a luminous tube; an illuminating arrangement having at least two illuminators serially connected with each other and deposed inside the luminous tube; and at least one retainer having at least contacting one end being contacted with an inner surface of the luminous tube to support the illuminators being stability located at a predetermined position inside said luminous tube, wherein the two illuminators are serially connected with each other along a central line of said luminous tube.

An enhanced lighting ceramic metal-halide lamp assembly provides a ceramic metal-halide lamp that operates to illuminate at high temperatures, have an increased life span, and improved color temperatures, color renderings, and luminous efficacies. The lamp assembly includes an at least partially transparent container forming a vacuum. Inside the container, a plurality of ceramic arc tubes are connected by two U-shaped coupling mechanisms. The coupling mechanisms are conductive and resilient, so as to provide both conductivity, and a buffering clearance between the ceramic arc tubes. The lamp assembly is also unique in that it provides a 630 watt double ended ceramic metal-halide lamp, as the ceramic arc tube produces 630 watts, uses about 200 volts and 3 Amps when illuminating. At least one fastening bracket, having resiliency, extends between the ceramic arc tube and inner surface of the container to help stabilize the ceramic arc tubes inside the elongated container.

A double-ended ceramic metal halide lamp includes a luminous tube; at least two illuminators serially connected with each other deposed inside the luminous tube; and at least one ring-shaped retainers arranged between two illuminators to support the illuminators located along a central line of the luminous tube. A manufacturing method for a ceramic metal halide lamp includes following steps: (1) Arrange at least two serially connected illuminators inside an interior of a luminous tube; (2) Seal two ends of the luminous tube by a press sealing technique; and (3) Extract out the gas inside the luminous tube to form an eyelet at a central portion of the luminous tube.