Author Topic: Why calcium wasn't used in QMH lamps but only in CMH lamps?  (Read 431 times)
dor123
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Why calcium wasn't used in QMH lamps but only in CMH lamps? « on: September 03, 2024, 11:29:54 AM » Author: dor123
The question is in the title.
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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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Re: Why calcium wasn't used in QMH lamps but only in CMH lamps? « Reply #1 on: September 03, 2024, 07:01:31 PM » Author: James
Because it is too corrosive towards quartz.  In ceramic lamps with Dy-based fills it has the opposite effect of reducing corrosion, and in parallel slightly improves the red ratio.  Similar effect as with magnesium in ceramic lamps.
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