Leds are fine in most cases, but watch out for some vehicles that have a bulb test program built into the cars system. eg BMW X5.
The Leds will flash faintly when the trailer is plugged in, which is a problem at night, and we ended up always unplugging the trailer before backing down the ramp.
Anyway 9 months later the wiring failed, we went back to sealed bulb lights.
Next time they fail, it will be back to a light board..
Cheers.