micole66
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| What lamps turn green at the end of life? Mercury vapor or metal halide?? And why??
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funkybulb
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| First of all there no metal halide salt in Mercery vapor
Lamps.
Second why mecury lamps go EOL turning green and dim. That cause Emission mix and tungsten is deposted
On wall of the arc tube. This blocking the light output.
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No LED gadgets, spins too slowly. Gotta love preheat and MV. let the lights keep my meter spinning.
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HomeBrewLamps
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| Both turn green when they get old
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~Owen
 Scavenger, Urban Explorer, Lighting Enthusiast and Creator of homebrewlamps 
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dor123
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Other loves are printers/scanners/copiers, A/Cs
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| Not all metal halide lamps turns green when they gets old. I've seen ceramic metal halide lamps that turned dim warm white or even dim red. I've even seen halides depleted metal halide lamps, that looked bluish white, despite showing only the mercury lines in the spectrum.
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I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.
I only working with the international date format (dd.mm.yyyy).
I lives in Israel, which is a 220-240V, 50hz country.
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sol
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| Some probe start MH turns bright pink just before EOL. Usually the pink stage only lasts for a handful of startups, and then the arc tube leaks (or damages itself) and the lamp won't light. If the lamp is vertical, it usually doesn't explode, however.
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