The HID controllers put out a LOT of high freq noise. This can interfere with just about anything - CanBus communications, radio, CB, etc. Many people across the forums have taken them out. LED's on the other hand just have big resistors in series. The LED's don't emit any electrical radiation to cause noise.
General LED strip lighting FYI: Some people reported problems with the computer, where disconnecting extra LED strips fixed it. Said it interferes with the CanBus. What (IMHO) happens is the computer monitors the current used by say the brake lights. If an LED strip has an LED going out that causes enough current to be drawn, the computer will flag it and the bike goes into limp mode or throws codes. THis is very rare to happen though. Modern LED strips from our sponsors have never been a problem in my 6 years across three Spyders - all of them had ALL the LED's
Now the above should apply to the headlights - I think they are monitored to throw a code is one burns out (no current) or draws too much. I haven't seen enough info yet, just assume everything gets monitored! This means get your LED kit from one of our sponsors! Their kits have been in the field for a long time and have data to show they don't fail - or is extremely rare.
Steve