Why my 6500K 70W Aliexpress degrading when not in use « on: November 27, 2024, 05:11:45 AM » Author: dor123
I bought this lamp from Aliexpress at 14.2.2021: When it was new, its spectrum was rich in dysprosium: As the time elapsed, I've seen that the dysprosium emission get weaker and weaker, despite I barely using this lamp, because of it awful color and its UVA radiation which heats me. Now the spectrum looks like this: Why the dysprosium emission getting weaker during time, despite the lamp are rarely used???
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	Re: Why my 6500K 70W Aliexpress degrading when not in use « Reply #1 on: November 27, 2024, 05:21:26 AM » Author: AngryHorse
Manufacturers apathy?, given HID lamps are now a thing of the past, nobody really cares anymore about how their durability will be 🤨
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	Re: Why my 6500K 70W Aliexpress degrading when not in use « Reply #2 on: November 27, 2024, 05:27:17 AM » Author: dor123
The degradation happening when the lamp is in its package, not in use. I know dysprosium can lost from the arctube, according to what I've seen in the Osram HQI-BT 400W/D, that get green with age, but this happening during the operation of the lamp, not when the lamp don't working. Why that the dysprosium would lost from the arctube when it is cold. Also: I've seen that the arctube have tons of liquid dysprosium, so it looks like less and less dysprosium evaporating as the time elapse.
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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: Why my 6500K 70W Aliexpress degrading when not in use « Reply #5 on: November 27, 2024, 09:30:47 AM » Author: dor123
The lamp don't seems to leak, as the outerbulb is still clear. Also: In the picture of its arc, you can see tons of liquid dysprosium that simply don't evaporate. I hope that the solid DyI don't corrodes with the arctube when cold.
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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: Why my 6500K 70W Aliexpress degrading when not in use « Reply #7 on: December 04, 2024, 03:42:05 AM » Author: tigerelectronics
It is possible that the seal isn't perfect, and that some air has perhaps entered. Hard to tell for sure, though
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A young (21) swedish lighting collector who especially loves flourescent fixtures and tubes. I love industrial flouros the most. I also like HID. Let the lights be free'd from Err-Eee-Deee technology, pretty please!

	Re: Why my 6500K 70W Aliexpress degrading when not in use « Reply #9 on: December 04, 2024, 12:40:38 PM » Author: dor123
@tigerelectronics: The arctube don't leaking in the outerbulb. Also arctube leak in QMH lamps is very rare phenomenon, more common in CMH lamps.
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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.