I have a 2006 FXDI35 with stock org. Bulb and want a brighter bulb. Without going LED is their alternative bulb ?

 

Sylvania ultra star is one there are other you'll need to do a forum search for more options.

 

stay away from the ultra blue bulbs as they wash out in a dark night. also, most states have laws restricting the light to white. the 6000 kelvin temperature would be the bright white.

 

Can I use LED if it has the 3 prong plug?

 

Yes. Just make sure you get one that is indexable so you can get it to focus properly. Not all do and while they spray a lot of light, it is distracting because of the lack of beam focus. I eventually went with a Daymaker.

 

This^^^^

 

It’s brighter because it burns hotter reducing its lifespan

 

The problem with LED in an enclosure made for an incandescent is light scatter. Many times they look really bright standing in front of them, but aren't as defined, have a proper cutoff, and can blind oncoming drivers.

 

Yep, if you use them on a bike ,carry a spare
Don`t last in the cars where I`ve tried them