dor123
Member
Offline
Gender: 
View
Posts
View Gallery
Other loves are computers, office equipment, A/Cs
|
| My Philips ML 160W Chinese made SBMV lamp very so dirty in the outerbulb.
At the bottom part, there is some powder that migrate to other part of the lamp, according to the lamp holding position.
At the top part, there are black dots that don't moves.
What are these?
|
|
|
|
Logged
|
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.
|
RRK
Member
Offline
Gender:
View
Posts
View Gallery
Roman
|
| Looks like getter tablet disintegrated. I have one sloppily made 70W MH developing this after just a little fall from a chair to a carpet.
|
|
|
|
Logged
|
|
Laurens
Member
Offline
View
Posts
View Gallery
|
| My Aliexpress SBMV also has tons of stuff in the outer bulb. Lack of quality control i guess.
|
|
|
|
Logged
|
|
LightsAreBright27
Member
Offline
Gender:
View
Posts
View Gallery
Cheap LED Assassin
|
| I have an old 160w SBMV, alsonwith some concrete-like powder. Definitely the getter.
|
|
|
|
Logged
|
Holder of the rare and sacred  F10T12/BL lamps here!
Also known as LAB27 for short.
One of the only Indian members here!
245v 50Hz
|
RRK
Member
Offline
Gender:
View
Posts
View Gallery
Roman
|
| Here is an example what happens. Getter 'flag' is empty, and black powder everywhere.
Interestingly, some powder ended up on the burner, and painted zirconia coating blue!
This is 3K E27 Chinese - Russian lamp called DRI70/3K, of 2013, somewhat extremely sloppy made. Main use as a dummy MH to test unknown ballasts, not much regret if it gets blown, but it still manages to be alive, heh)
Na-Sc-Li inside, some ugly orangish light of circa 50(!) CRI.
|
|
|
« Last Edit: December 07, 2024, 02:25:15 PM by RRK »
|
Logged
|
|
dor123
Member
Offline
Gender:
View
Posts
View Gallery
Other loves are computers, office equipment, A/Cs
|
SBMV lamps don't have this solid state getter, and the Philips ML 160W China, don't have hydrogen getter either like older version like this one . @James can help? |
|
|
|
Logged
|
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.
|
James
Member
Offline
Gender:
View
Posts
View Gallery
|
| I would also have said getter disintegration. Almost all SBMV lamps I am aware of use that, its simply not possible to make a decent SBMV lamp of about 250W snd less without that due to there being no phase shift between voltage and current waveforms on a resistive ballast. The arc reignition spikes would be too great without a hydrogen getter.
If there really is no Zr/Al getter present I do not know what else this coating might be. Unless it is deterioration of the coating itself? Calcium pyrophosphate develops such kind of brown spots if used under the heat of SBMV lamps.
|
|
|
|
Logged
|
|
