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CCFL orange end glow
I do believe that this CCFL is nearing EOL, as the ends are totally blackened, and when powered, they stay orange colored even after it's warmed up!
Keywords: Lit_Lighting

CCFL orange end glow

I do believe that this CCFL is nearing EOL, as the ends are totally blackened, and when powered, they stay orange colored even after it's warmed up!

P1020155.JPG P1020132.JPG P1020136.JPG P1020081.JPG P1020105.JPG
File information
Filename:P1020136.JPG
Album name:RCM / Lamps
Keywords:Lit_Lighting
Filesize:286 KiB
Date added:Aug 07, 2011
Dimensions:3000 x 2250 pixels
Displayed:159 times
Color Mode:Normal
Color Space:sRGB
Contrast:Standard
DateTime Original:2011:08:05 09:55:16
Exposure Bias:0 EV
Exposure Mode:0
Exposure Program:Program
Exposure Time:1/250 sec
FNumber:f/3.1
Flash:No Flash
Focal length:5 mm
Focus Mode:Auto
ISO:160
Light Source:Unknown: 0
Make:Panasonic
Max Aperture:f/3.1
Model:DMC-FH2
URL:http://www.galleryoflights.org/mb/gallery/displayimage.php?pid=7782
Favorites:Add to Favorites

Comment 1 to 4 of 4
Page: 1

A_lights   [Aug 07, 2011 at 02:24 PM]
Cool! I've seen the T8 lamps in freezers do this too at EOL
RCM   [Aug 07, 2011 at 03:51 PM]
So it is at EOL it was heavily used when the DVD player was working...I guess that's why its really close to death
dor123   [Aug 07, 2011 at 03:53 PM]
In this case, i think that the reason for this orange glow at the end of this CCFL lamp isn't related to its proximity to EOL, but to its gas filling, as because in CCFL, electrodes don't takes the form of filaments (They looks like solid rods or they are hollow), no glass stem is required, and therefore there is no glass inside the tube.
We had in my mother home a HP Scanjet flatbed scanner of some model, that had a CCFL with a similar red glow on the ends of the lamps.
At that time, i thought that this was caused by the incandesence of the electrodes, but today i"m sure that the reason was simply because of an addition of neon to the gas filling, that caused a red negative glow around both electrodes.
This may be also in this case as there is no glass parts in the tube to prdouce sodium orange color.
Similar case, was happened in the office of my father with a Mustek flatbed scanner, in which one day, the light of its CCFL lamp suddenly turned out for no reason from a white light to a RED light.
Initially i don't knew why this was happened (As a document/photo scanner with a red lamp instead of green [for a B&W scanner] or white [For a color scanner] is senseless and useless). However, today i know that the scanner CCFL lamp, became mercury straved, and the red color of the lamp was simply: because of a presence of neon in the gas filling.
So i think that the orange glow is a neon negative glow and not an EOL behavior.
RCM   [Aug 07, 2011 at 04:03 PM]
Thanks for the helpful information dor123! Appreciated I think you may be right on the gas filling for these I need to find another ccfl to check!

Comment 1 to 4 of 4
Page: 1