I finally got my TW chip, and WOW!

So i was playing with it in the Extreme setting, had my foot burried, and i look up at the pyro and it was readin 1400*
So the question is, how high and for how long can i run it over 1250* before i damage stuff? Also, is there anyway i can rig up a light somehow that will light up when the pyro hits 1250*?