Author Topic: Blue spot at end of CFL tube  (Read 871 times)
70HPS
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Blue spot at end of CFL tube « on: November 06, 2022, 02:13:56 AM » Author: 70HPS
One of my CFLs that has seen lots of usage has a blue spot at one end of the tube. Does this mean it's near EOL?
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Medved
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Re: Blue spot at end of CFL tube « Reply #1 on: November 06, 2022, 02:30:33 AM » Author: Medved
How exactly it looks like? Is it just a small "pinhole", or the whole area around the electrode gets bluish?
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70HPS
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Re: Blue spot at end of CFL tube « Reply #2 on: November 06, 2022, 03:07:30 AM » Author: 70HPS
Small spot on the tube end.
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I like HID, CFLs and incandescents :hps: :cflhd: :a19incan:

Favorite indoor light source: PL Fluorescent (Preferably preheat, maybe rapid start, maybe instant start but instant start is boring)
Favorite outdoor light source: High Pressure Sodium (MV maybe, but HPS is relaxing)

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Re: Blue spot at end of CFL tube « Reply #3 on: November 06, 2022, 03:45:38 AM » Author: Medved
Just amall spot alone won't mean anything, maybe just a bit of phosphor flaked off...
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