Rx7s powerstar hqi ts excellence halogen metal steam bulb with quartz technology osramthe powerstar hqi ts excellence is the innovative development of the successful hqi ts into a new design directly 11 interchangeable uv reduced compact and equipped with a double sided connection only permitted for closed lampsadvantages of hqi ts excellence high efficiency even light distribution very good colour reproduction long lifespan in the light colour warm white de luxe can be combined wi