So model of bulb I have is YLDP02YL. I have 6 of them. I’ve been using them for 2.5 years and recently noticed a drop of liquid on the white plastic part of a bulb.
This liquid is oily when you touch it.
I’d like to know what’s the reason for this? Is this liquid safe? What should I do? Currently this liquid have been found on 3 out of total six bulbs.
Same here with at least 1 of my 15 bulbs.
Is it from the light bulb itself? Do you use a humidifier or anything? This is interesting, never seen anything like this before!
It’s definitively from the bulb and kind of oily.
Yes it is from the bulb. And yes it’s also oily here. It also appeared second time, but still no third time.
I wrote to support and they suspected it’s water vapor condensate, but
drops of water on bulbs would appear again with the same climate conditions (which I tried, they did not appear again)
air conditioner actually dries air
given drops of liquid on bulbs are oily and don’t completely dry when they drop on a surface. Water is not oily, water condensate is water.
when condensate appeared on one bulb it should also had appeared on all other 5 bulbs in the same room
I suspect two things
But for the 2. bulb looks tightly closed, so only if plastic can let electrolyte through,which I don’t know possible or not.
Over here I’m having standard mid european weather conditions, nothing special a bulb should suggest from…
So then it’s electrolyte or plastic degradation without special conditions or something else.
Finally after 3.5 years I found the cause. I would have discovered it three and a half years ago if I had taken the bulb apart then. But I did it now, since all 5 bulbs are still leaking.
So. Where the cap meets the body of the bulb there is a white sealant. That’s the cause. It’s decomposing probably because of heat and producing the oily liquid.
Here it is:
