Before carrying out these tests, you should observe the ballast, by exposing it. This is caused by a capacitor becoming weak with age. At the point in which the ballast is buzzing, the windings are now beginning to touch, and vibrate resulting in sound. The arc might get damaged and, as halides are encased in glass, might even crack or shatter if enough charge enters too quickly. This is a common compliant for businesses replacing a small portion of metal halide lamps, and mostly is the complaint we receive when the customer or electrician replaced a burnt out lamp. SYLVANIA Metal Halide Lamps T6/T7.5 (G12) and TC Lamps A = Maximum Overall Length B = Light Center Length C = Diameter T6/T7.5 (G12) TC A B C B C Key to Date of Manufacture The existing date code system is comprised of 4 characters. Metal Halide Bulbs. The leaking oil proves that pressure from excessive heat has broken the internal seal, so if you observe any leak, you should replace the entire thing. A researcher by the name of Charles P. Steinmetz was the first person to take a mercury vapor lamp and use halide salts in an attempt to produce a better light color. Metal halides are produced as a result of combining halogen with a metal. Join Date: Sep 2010. Metal Halide bulbs need to cool before they can be restarted. A ballast serves as a lamp starter and regulates power to the light. Password: Register: Articles: Rewards: Search: Today's Posts: Mark Forums Read: Page 2 of 2 < 1: 2 Thread Tools : Display Modes: 10-06-2011, 12:26 AM #21: HARRY304E. Metal Halide bulbs produce light in every direction. //
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