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.
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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.