[Dustin]

if i don't have the resistor what would happen? and where does the resister go i need help asap i put the 12v leds in without a resistor, they worked for like 2 mintues, then nothing, now they occasaionally work, where do i wire the resistor?

go with the 5.2V leds (i think theyre 5.2V) and ask the people at RS what kind of resistor you need to run to get a 12V down to a 5.2 (or whatever it is) and then just solder it to the LED itsself, but use the connection for the resistor instead of the LED.