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Old 02-14-2004, 07:57 PM   #1
brokemypiston
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Default Anyone ever see this with gas filled bulbs?

I might be off on this, but has anyone noticed that gas filled bulbs that are non HID will begin to get dimmer over time. I've had these headlight bulbs for about 3 months now, and am beginning to think they're a bit dimmer than they used to be. Anyone ever see this problem?
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Old 02-14-2004, 09:28 PM   #2
nhluhr
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if by "gas filled bulbs" you mean every single bulb that's ever been manufactured, then yes, it happens.

But more likely what is happening in your case, the connectors between the bulb and socket are getting some corrosion on them and that's limiting current and causing a voltage droop. Clean the connectors and apply some of that grease to seal them and keep them clean.

-Nick
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Old 02-15-2004, 01:24 AM   #3
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what type of grease?
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Old 02-15-2004, 12:40 PM   #4
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White, die-electric grease.
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Old 02-15-2004, 04:52 PM   #5
brokemypiston
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and actually, on that note, I thought all halogen bulbs were vacumed and xenon were the ones that were gased. might be wrong on this
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Old 03-06-2004, 09:40 AM   #6
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.

Last edited by 8Complex; 03-07-2004 at 02:20 PM.
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Old 03-06-2004, 10:09 AM   #7
redwagon
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Quote:
Originally posted by brokemypiston
and actually, on that note, I thought all halogen bulbs were vacumed and xenon were the ones that were gased. might be wrong on this
It's been a few years since I looked at the periodic table, but IIRC xenon is in the class of the halogen or inert gases. So are argon, neon, helium and a couple others I can't remember now. Xenon has been used in bulbs and strobe lights for a very long time. It's easier to fill a bulb with a gas that doesn't allow the filament to burn than it is to try to evacuate it, plus the envelope doesn't have to be as strong
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Old 03-06-2004, 01:56 PM   #8
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Halogen and incandescent bulbs both get dimmer as they get older. The filament material burns off and condenses on the outside of the bulb. This is one of the reasons people think blue-coated bulbs are better than standard halogens -- they replace their old bulbs with these substandard new bulbs but still get more light in the end.

It happens much less with halogens if they're run clean and at the proper voltage, though; the halogen cycle allows the material to recondense on the filament.

3 months shouldn't make a big difference, though... If you are for some reason feeding them too low a voltage or if they're dirty you should rectify that by cleaning the contacts however you like and by cleaning the bulbs with isopropanol.

Oh, and all halogen bulbs have some xenon in them.
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Old 03-07-2004, 04:50 AM   #9
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Quote:
Originally posted by topdaytrader
.
uh. . . doing a little bit of illegal advertising on the forums, are we? BAN!

http://forums.nasioc.com/forums/sear...earchid=696547

Last edited by 8Complex; 03-07-2004 at 02:20 PM.
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Old 03-07-2004, 10:08 AM   #10
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How does coating the glass envelope of the bulb a blue color make it brighter? I would have thought any kind of filter would make it dimmer rather than brighter...
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Old 03-07-2004, 11:34 AM   #11
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redwagon - You're right. Seems motionr's customers aren't as "bright" as you.



Sorry, couldn't resist.
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Old 03-07-2004, 02:31 PM   #12
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Quote:
Originally posted by redwagon
How does coating the glass envelope of the bulb a blue color make it brighter? I would have thought any kind of filter would make it dimmer rather than brighter...
Bingo! This is something nobody seems to understand.
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Old 03-07-2004, 10:33 PM   #13
redwagon
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Just found D. Stern's site. Mystery solved
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