Dirt on the arctube of my Aliexpress 70W 10000K MH lamp « on: November 15, 2025, 11:37:54 AM » Author: dor123
I've noticed that the arctube of my Aliexpress 70W 10000K MH lamp is very dirty: https://www.lighting-gallery.net/gallery/displayimage.php?pos=-263254 What is all that dirt?
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	Re: Dirt on the arctube of my Aliexpress 70W 10000K MH lamp « Reply #1 on: November 16, 2025, 07:46:49 AM » Author: dor123
Update: Here is a closeup picture of the arctube of the lamp with flash enabled, to show that dirt in the arctube. What it is?
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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.

	Re: Dirt on the arctube of my Aliexpress 70W 10000K MH lamp « Reply #2 on: November 16, 2025, 08:33:08 AM » Author: AngryHorse
Looking at it now unlit, it looks more like just a rough silica tube moulding?, is this actually in the glass itself or on the surface of it?
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	Re: Dirt on the arctube of my Aliexpress 70W 10000K MH lamp « Reply #3 on: November 16, 2025, 08:42:31 AM » Author: dor123
The dirty is on the outside of the arctube.
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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.

	Re: Dirt on the arctube of my Aliexpress 70W 10000K MH lamp « Reply #4 on: November 16, 2025, 08:47:26 AM » Author: AngryHorse
Interesting 🤔, maybe the environment they were made in wasn’t as pure as it was with European manufacturing?, and airborne particles stuck to the tube when still hot from moulding? I haven’t seen this before?
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	Re: Dirt on the arctube of my Aliexpress 70W 10000K MH lamp « Reply #5 on: November 16, 2025, 09:15:29 AM » Author: dor123
I hope this don't increases the risk of an arctube explosion?
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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.

	Re: Dirt on the arctube of my Aliexpress 70W 10000K MH lamp « Reply #6 on: November 16, 2025, 04:43:35 PM » Author: AngryHorse
Shouldn’t be a problem in your enclosed fixture?, although it would be sad to loose the lamp prematurely? 🤔
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	Re: Dirt on the arctube of my Aliexpress 70W 10000K MH lamp « Reply #7 on: November 16, 2025, 09:18:42 PM » Author: dor123
The lens of my tracklight is made from regular soda lime glass. It would break in the case of arctube explosion.
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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.

	Re: Dirt on the arctube of my Aliexpress 70W 10000K MH lamp « Reply #8 on: November 17, 2025, 01:29:26 AM » Author: xmaslightguy
I have a 70 MH lamp (GE if I remember right) that has the same inside...I always just assumed it was halide salts deposited on the glass when it cooled after running.
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	Re: Dirt on the arctube of my Aliexpress 70W 10000K MH lamp « Reply #9 on: November 17, 2025, 03:31:24 AM » Author: dor123
The fact that the same dirt don't going downward, meaning it is outside the arctube wall rather than inside.
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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.

	Re: Dirt on the arctube of my Aliexpress 70W 10000K MH lamp « Reply #10 on: November 17, 2025, 04:07:20 PM » Author: AngryHorse
Quote from: dor123 on November 16, 2025, 09:18:42 PM The lens of my tracklight is made from regular soda lime glass. It would break in the case of arctube explosion. If it’s a genuine track light for halide, I’d guess it’s designed to contain a tube rupture 🤔
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