Quote Originally Posted by Kal El Rah View Post
Hi Guys,

I may not be right about this but it sounds to me like maybe there is some kind of contact with the LED wire up and the heatsink causing some type of short but still being able to light up the LED. DC voltage has a tendency to heat up metal quickly when shorted out. I could be wrong but it might be possible.
To generate that kind of heat, it would have burned out that short a long time ago. It could be possible that these P4 LEDs he got are defective, and cannot really take the currents rated?

Have you tried to use a lower current buckpuck? Say 350 mA or 700 mA one and see if it gets too hot?