I have soldered two wires onto this Cree XHP 70.2 LED, tested it in a circuit, and everything works fine. I intend to wire four of these LEDs in series and drive them together at about 48V and 2.4A (12V each). My only concern is how close the solder is to the copper LED backplate (see images below).
I'm worried that it might arc to the backplate and create a short circuit, bypassing the LED. Is this a legitimate concern?