The led clock on my 99 camry dashboard seems to fade in and out.
all other lights inside and out seem to be fine.
anyone seen this before?
is this a pointer to a battery needing replacing or what?

Mine does it too once in a while. I just hit the top of the dash and it goes back to normal. I am guessing that it is a loose connection. I am way too lazy to spend a day off or a weekend pulling the dash apart. Please note I am a college student who has a 4 day weekend with a break in between my two days of school. Who has it better then me?

The led clock on my 99 camry dashboard seems to fade in and out.
all other lights inside and out seem to be fine.
anyone seen this before?
is this a pointer to a battery needing replacing or what?

If it were a battery problem, you would notice it in all the lights. As WNYC noted, it is probably a loose power connection or ground.

The led clock on my 99 camry dashboard seems to fade in and out.
all other lights inside and out seem to be fine.
anyone seen this before?
is this a pointer to a battery needing replacing or what?
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Probably not your problem, but you should be aware that the clock dims when the headlights are on. (so it's not too bright at night)