Engine in question is a Lionel 11202. Original headlight is yellow at best. Went to forum sponsor Evans Designs website and they have the 3 mm LED with the bridge rectifier, the correct capacitor, and the resistor.
I'm no electronics expert, but this appears plug and play, correct?
Next question. Holding the LED in place. I've seen tacky wax, clear silicone, hot glue?? Best option??
Thanks!!