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Apesbrain

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I have a fluorescent desk lamp that recently developed a problem: it will turn on first thing in the AM, but by the time I've gone to make my coffee and return it is off. If I switch it off and wait 10 minutes, it will often come back on but this cycle may need to be repeated a few times before it will stay on for the day.

It is a bit of a bother to disassemble this lamp, so I'm asking if the first suspect for replacement is the bulb (a square 4-pin tube) or the ballast? The bulb is about 3 years old; the ballast around 10 years (when I first needed to replace it.) Thanks.
 
Replace the lamp.
wont do any harm to try.
 
Replace the lamp.
The "lamp" or the "bulb"? I'd like to keep the lamp (fixture).

I got a new ballast today and replacement bulb (28W GR10q 4-pin) is on the way. Since bulb won't arrive for a few weeks, I'll probably replace the ballast and see if that fixes the issue.
 
And after many years of working with Joe Public this is why I just call them a "bulb" these days lol

Nothing wrong with calling them light bulbs.
 

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