I just finished converting all the external lights to LED. I had to add load resistors on the turn signals to make them work properly. A word of caution, the resistors run VERY hot. I had to make heat sinks from some aluminum channel and screw the resistors to them. My lights are plenty bright, but you do have to match the LED color to the lens color or the light will lose 2/3 of its brightness.
Bruce Dickson 2013 Thor Challenger 37GT, 5 Star Tune, Safe-T-Plus Steering Control with Air Trim, Roadmaster front and rear Sway Bars, SuperSteer rear Track Bar, Crossfires, 2012 Honda CRV on Blue Ox Aventa LX tow bar. Full timers since Jan 2012.