![]() ![]() The sole purpose of these heavy gases is to create a level of pressure within the bulb that deters tungsten evaporation. Because tungsten evaporates away rather quickly, researchers learned to fill the bulbs with inert gases like argon, krypton, and yes even the infamous xenon. Now stepping back to the gas filling as mentioned earlier. In simple terms you have a dead light bulb. Sooner or later the filament will evaporate enough tungsten particles that it snaps in two pieces and breaks the electrical circuit. When the tungsten evaporates, it deposits itself on the relatively cool surface of the glass bulb (this is why dead light bulbs are often black), and the filament becomes thinner and more brittle. Secondly, as the halogen bulb is used, tungsten atoms begin to evaporate from the filament due to the extreme heat. It is a very simple technology fundamentally, but there are flaws in the halogen mostly relating to efficiency of power.įirst of all, halogen bulbs produce more heat than they do actual light (incandescence), which translates to an inefficient usage of potential energy. Fog lights operate at around 35 watts to 55 watts, and high beams at 55 watts to 85 watts. Halogen low beams will normally operate on 55 watts of power. This is essentially the same principle of operation as fire: intense heat used to produce light. It is this high resistance that produces heat and ultimately light as a byproduct. When electrical current is supplied to the positive lead wire in the halogen bulb, it crosses a path of tungsten wire, which has very high electrical resistance. The bulb itself is also filled with a noble gas of some sort, which we'll get into later. On some bulbs, like the 9006/HB4, the glass bulb that encases them is capped at the end with a nickel-plated brass film. The filament is held up by two chemically-treated, copper-coated steel (or molybdenum) lead wires. The bulb itself houses a filament commonly made of tungsten metal, which is basically a very delicate loose coil of exotic wire. Halogen lighting involves a conventional direct-current direct-circuit setup. ![]() Halogen is what has been used in automotive lighting for the last 50 years or so and has peaked in its technological advancement. Before there was HID technology, there was halogen lighting. Over all, it will use much less power than conventional halogen lights.First a background of automotive lighting technology. Longer service life - HID lamps will last 3 to 5 times longer than halogen bulbs. ![]() Whiter light - The color temperature of HID lights are much closer to the color temperature of natural daylight. More light output - uses about 1/3 less than conventional lights (55w vs 18w) and is more efficient. Some of the advantages of HID lights over conventional halogen lights: The amount of light produced is greater than a standard halogen bulb, while consuming LESS POWER, and more closely approximating the color temperature of natural daylight. To operate, they require ballasts, which supply proper voltage and control current. The light is emitted from an arc discharge between two closely spaced electrodes hermetically sealed inside a small quartz glass tubular envelope capsule. ![]() Posted on Wednesday, Aug18:28 GMTHigh Intensity Discharge (HID) lighting technology replaces the filament of the light bulb with a capsule of gas. ![]()
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