Correct, instead of using a filament to create the light, and electrical charge is passed thru the gas to create a glowing arc. Sodium vapor lamps (Like street lamps or those in stadiums) are not well suited for auto applications due to their yellowish tinge and large ballast.Originally posted by Kompressor:
Someone told me they're simiilar to stadium lighting HIDs, which use Mercury and sodium vapors. But if you've ever seen those lights start up, they take a good 3 or 4 minutes to light up to 100%. To solve that start up problem in car lamps, Xenon was used.
Exactly! Those cheap little blue bulbs you see in auto stores are not HID's. They may contain Xenon in the bulb chamber, but they are still filament based. Not even close to the real thing. This borderlines on deceptive advertising in my opinion.Originally posted by Kompressor:
They're fake. Xenon light requires special hardware, such as a ballast and coil because it requires a couple kV to start.
no this is incorrect. Halogen bulbs have halogen gas and a tungsten filament. No xenon gas in a halogen bulb. Some xenon lamps have filaments too, but they are called "xenon" bulbs. HID have no filament, and you are correct there.Originally posted by hurricane:
The newer halogen bulbs have some xenon gas in them and these are often referred to as xenon bulbs. But they work just like the old halogen bulbs - a glowing filament. HID are filled with pure xenon gas and using extreme voltage to produce an arc that creates the ultra-white light.
Originally posted by s0yb0mb:
no this is incorrect. Halogen bulbs have halogen gas and a tungsten filament. No xenon gas in a halogen bulb. Some xenon lamps have filaments too, but they are called "xenon" bulbs. HID have no filament, and you are correct there.[/QB]
I was lucky the internet search sorta backed up my original guessOriginally posted by s0yb0mb:
Ok, you got me
Here's something your internet search dind't uncover: Halogen bulbs were originally developed as industrial drying elements, and not as light sources.