Here's a demo and info session on a xenon metal halide bulb that I made a reflector for and use as a work/desk light. It was originally a HID retrofit kit for automotive lighting. Metal halide is a type of high pressure discharge lamp that is basicly the evolution of the mercury vapor lamp. It uses very similar control gear (ballasts, ignitors, etc) but adds various halide salts to enhance light output and color spectrum. They have the best color rendering index of all high pressure arc lamps, as high as 0.96, second only to xenon short arc lamps used in large movie projectors. They are second in efficiency in lumens/watt only to sodium arc lamps. They are commonly used to light areas such as gyms, sports fields, streets, parking lots, warehouses, and, of course, ice arenas. Current offereings in high output fluorescent lighting such as T8 and T5 fixtures are gaining favor for indoor lighting since they are more efficient, can output equivalent levels of light at high color rendering indexes, put out less radiant heat, are easier to maintain, provide more diffuse lighting, and are easier to implement in ways to enable various levels of light output for a given installation. This example is a xenon discharge lamp that uses xenon for higher initial light output to make it more practical for use in automotive headlights. The ballast also has a pulse start ignitor that is strong enough to hot strike the bulb, meaning it can restart when still hot from running. The voltage <b>...</b>