The inside of a car I think can get to 60C. Dash LED's have to survive
that.
Really..an LED in an oven at 125C harms what?
Most solders melts around 180C to 190C so internal connections in the
LED should be ok..
The plastics used in SMD LED's have to handle wavesoldering so that's
probably ok. (Contact LED manufacture for plastic flowing point.)
I did a quick look (.interesting topic) and foundhttp://
www.marktechopto.com/Engineering-Services/Details%20-%20LEDs%2...
Shows a conductive silver paste..
I'm guessing that's a conductive adhesive.
That might be the spoiler.
However..the plastic that was melted over the adhesive has to tolerate
wavesoldering.
So..the conductive adhesive tolerates short term heat.
D from BC