Can you continue to use a broken LED?
The LED in question has a gap in its plastic casing. This is what it looks like:
When switched on, the LED still lights up normally and in a vibrant color.
Should I be concerned about gases like arsenic oxide escaping from the gap due to the damage? Or does this only happen when the chip burns through?
I had a similar problem before, but the gap was significantly wider, and I didn't notice it for a long time. Not even when the LED burned out. Only when I unscrewed it did I get a good dose of arsenic oxide from the crack, because the chips in warm white LEDs are made of gallium arsenide phosphide.
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If the thing “burns” it doesn’t matter if there was a crack in it or not, the gases or the smoke is the same.
The problem with the crack is that voltage-carrying parts can be released at some point when, for example, pieces fall off the housing when more cracks occur.
It doesn’t matter from function. If the pear was in a closed lamp and then you would always turn off the stream before you open it, you could say that you can continue to operate it. But as in the picture, this is dangerous, alone when cleaning or cleaning. Dust wiping can exist there.
So I’d rather buy a new one and screw it in.
P.S.:
You can also consider buying a LED surface lamp. They are cheap, often offered in discounter at wahnssssleine prices and that give off a much better light than an LED bulb.
And the larger area covers all the holes and other beauties of the old lamp.
An Aldi surface lamp that makes the room exactly as bright or brighter costs less than an E27 bulb alone.
What gases? LEDs consist of semiconductors, i.e. solids. Gallium arsenide is a crystal. There’s nothing evaporating. How do you think that you could have “a proper dose of arsenic oxide”? I think this is impossible. The temperature during “burning” is also not sufficient for evaporation. At 200 degrees each LED is dead. However, gallium arsenide has a melting point of 1238 degrees.
An electrician-known later smashed the lamp with the necessary safety precautions. The entire chip including phosphor layer and parts of the plastic layer around it were burned, carburized to black mass. Incineration processes take place at 1400° C., and arsenic escapes from the compound at about 600° C.
After turning out, I held the gap right in front of my nose and added a severe irritation of the nasal sinuses, which took a damaging effect on the brain to the extent that I can judge that of the physical symptoms and the subsequent medical examination, which occurred directly after the accident.
I had never seen what you wrote here in a few minutes in my 35-year work.
Then you can appreciate yourself happy, because I don’t wish anyone. The fact is that LEDs are not as stable as they are frequently advertised.
And only the practical experience of the fact that it has happened proves that it is quite possible at the physical level and not absolutely unlikely.
You don’t have to worry. Because the case is pure ornament. The light-emitting diodes themselves are basically encapsulated in plastic. You couldn’t shine. The luminous effect of a semiconductor can only function in an air-free space.
What if the chip with plastic burns through, as it was the case once? Finally, small amounts of oxygen pass through the gap into the housing.
Actually, that should be safe if this is really an LED. But in case of doubt, read what the manufacturer writes or asks about it.
Do I, Philips has no idea what the components of their LEDs are and what damaging effect they can have (or hides it specifically), and recommends to dispose of damaged LEDs directly.
Hm, okay. It was kind of a way to make that answer.
The standard set in virtually any guide is simplified “If damaged, no longer use!”
The manufacturer can then be sued correctly if he gives an OK and then what happens. So in doubt he always says “NO!”
Yeah, I thought so. But could have been…
There’s something going on when you try to screw the lamp out. So that the plaste is shattering even more there, and you get a power strike at the interiors. So just leave until it doesn’t work anymore.
You won’t experience poisonous gases from such a lamp. Highest in really very safe mini quantities.
At some point, the LED must be changed. Would it not be more advantageous at this point in time to prevent the GaAsP layer (galium arsenide phosphide) from burning through the chip again and from causing highly toxic gases?
As I understand it correctly, in the damaged state of this LED, do I risk a power stroke when unscrewing?
The poisonous gases you only imagine, see the answer of segler1968. To change the lamp, it is then recommended to switch off the fuse beforehand.
Neutral observation:
yellow-colored LED chip (or phosphor layer) is burned or carbonized
The surrounding layer and thus also the crystalline substrate are burned or carburized.
Intensive odours flowed out of the gap of the housing, which resulted in a strong mucosa irritation and pressing pain in the inner region of the head and innocence.
How would you value this neutral situation at a logical level? Probably the most obvious that in combustion oxides escape and the breaking point in the housing favors the combustion process, if not just allowed.
Thank you, the lamp will be changed tomorrow.
The housing of the LED would have to break. Why would it do that?
In the housing there is already a narrow gap, is it safe?
From personal experience, I can judge that the crashing of the housing is not so unlikely, with the cause of it remaining a mystery to me.
To date, I have only brought an LED to burst by applying a multiple of the permissible voltage.
But if you have such concerns, you should dispose of the lamp -> problem solved.