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GE M-400A1
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Pink MH « on: April 26, 2008, 11:18:51 PM » Author: GE M-400A1
Hey Everyone,

One question,

why do metal halide lamps go to a pink color?

Thanks
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Foxtronix
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Formerly "TiCoune66". Also known here as Vince.


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Re: Pink MH « Reply #1 on: April 27, 2008, 12:54:20 PM » Author: Foxtronix
When a MH lamps becomes pink, it enters at his EOL (end of life); the lamp will burn out soon, or explode  :o I'm not sure HOW does it become pink. I think sodium halide or simply sodium in arc tube go covering the electrodes and get the start voltage higher. Correct me if I'm wrong...
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sparkie
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Re: Pink MH « Reply #2 on: April 27, 2008, 03:55:58 PM » Author: sparkie
Beware - Pink is a warning colour, to warn you to change the lamp ASAP... or else   BANG!
« Last Edit: April 27, 2008, 03:58:33 PM by sparkie » Logged
Mr. Big
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Re: Pink MH « Reply #3 on: April 27, 2008, 04:20:23 PM » Author: Mr. Big
Quote from: sparkie on April 27, 2008, 03:55:58 PM
Beware - Pink is a warning colour, to warn you to change the lamp ASAP... or else   BANG!


Very funny!

They can also go green and then BANG! ;D
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TudorWhiz
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Re: Pink MH « Reply #4 on: April 28, 2008, 12:49:49 PM » Author: TudorWhiz
 actually green is being underpowered! usually that means a bad cap or missing one!
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Mr. Big
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Re: Pink MH « Reply #5 on: April 28, 2008, 03:13:23 PM » Author: Mr. Big
Quote from: TudorWhiz on April 28, 2008, 12:49:49 PM
actually green is being underpowered! usually that means a bad cap or missing one!

What if it's a good cap! :P
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J-Frog
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Re: Pink MH « Reply #6 on: April 29, 2008, 09:08:41 AM » Author: J-Frog
Then the lamp has a lot of thallium in it or it's a worn out CMH lamp.
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Jeremiah The Bullfrog

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Re: Pink MH « Reply #7 on: May 01, 2008, 06:04:21 PM » Author: Michael
Quote from: J-Frog on April 29, 2008, 09:08:41 AM
Then the lamp has a lot of thallium in it or it's a worn out CMH lamp.

Possibly the lamp was a MH filled with Thallium so the EOL colour will be Green!
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