I re-did my trailer to all LED and ordered everything (marker and tail lights) from http://shop.easternmarine.com/Optronics MCL 96RB & MCL 96AB were the LED side marker lights I installed with no problem, no re-wiring.Optronics STL 72RB were the stop, turn, run, tail lights that I ordered, no grommet, no wire plug, only $11.00 ea. Pop out the old incadescent fixture, un-plug, re-plug new LED, and wiggle, jiggle the new lamp into the existing rubber grommet.