Are you certain your resistors are 270ohm (red/mauve/brown) and your power supply is 12 volts, since they should not be getting "hot" irrespective of the LED rating. And of course, is it wired as you have shown.
Are you certain your resistors are 270ohm (red/mauve/brown) and your power supply is 12 volts, since they should not be getting "hot" irrespective of the LED rating. And of course, is it wired as you have shown.