A double jacketed high intensity discharge lamp

摘要

An electric discharge lamp includes a light transmissive inner jacket (12) that defines a sealed inner chamber (14), a first material (20) in the inner chamber (14) that emits light when activated, and a light transmissive outer jacket (16) around the inner jacket (12). The outer jacket (16) defines a sealed outer chamber (18) between the inner (12) and outer (16) jackets that contains a second fill material (22). The second fill material (22), when activated by heat from the inner chamber (14) when the lamp is operating, converts ultraviolet (UV) and deep blue light emitted from the inner chamber (14) to visible light, thereby increasing an amount of visible light transmitted through the outer jacket (16) compared to an amount of visible light transmitted through the inner jacket (12).