Dark patches on bulbs

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rusugiru
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Dark patches on bulbs

I recently put new bulbs into my bathroom vanity light bar. They are GE soft white LED G25 60W equivalent frosted bulbs.

The first one developed dark patches as soon as I screwed it in. I thought maybe that was because I did not turn off the wall switch when I was installing it, as well as holding it with my bare hand. So with the next bulb I turned off the power and also held the bulb in a cloth as I screwed it in. It still has some dark patches on it, although much fainter than the other bulb.

Are the bulbs defective or am I doing something wrong?

Lightbringer
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pix…

09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0

how2
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Can you post a picture so we can get a better idea of what these patches look like.

rusugiru
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I can’t see a way to add a photo. When I click on “insert image” it just asks for a URL.

raccoon city
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There is a link in my signature on how to post pics on BLF.

rusugiru
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Not sure that worked…

https://imgur.com/a/S6LoPYU

goshdogit
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Perhaps the inside surface is already dirty from the factory.

Do you have any other bulbs you haven’t installed yet? Hold a flashlight tight against the plastic dome to check for spots before powering it up.

rusugiru
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But it was almost as if I could see the marks spreading as I installed the bulbs, especially the one on the right. It doesn’t look like dirt.

goshdogit
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I’ve heard that excess soldering flux can produce smoke that forms cloudy spots on a flashlight lens or reflector. Perhaps these bulbs were sloppily assembled.

It’s disappointing that a lightbulb designed for use in fixtures where the bulb is purposely visible would immediately become unsightly. That would bother me every time I entered the bathroom. Silly

I would return them and find an alternative.

Hank33
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It might be because the bulb’s nearing end of life? I saw it happen with some of my fluorescents but yours is LED so could be similar?

rusugiru
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No – these bulbs were brand new…

Hank33
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rusugiru wrote:
No – these bulbs were brand new…

Then looks like just a bad batch probably. Also manufacturing defect maybe regarding the gas and/or coating?