So what (grin) resistor should i use for this LED then? :D

nice stead 9.7v for the past 2 hour

I have had LEDS run at all sorts of steady voltages, but again voltage is not the issue, great you have a 9.7 volt supply, whats the current when you first turn it on, whats the current after 2 hours

does it exceed the heat or current ratings?

you dont know or else you would have provided numbers

I am not going to bash you, but "its works and I can touch it" is useless in the real world, watch them dim 40% in a month, I dont care