litronics looks like this:

see the round projector in the middle that carguy mentioned?
regular (halogen bulb) headlights look like this:
Now if you're asking if there's a difference in the light they produce, basically you'd be looking at that normal, slightly yellowish light coming from regular halogen lights, and a whiter, more focused beam coming out of litronics.
Hope we've been able to help, if not please be more specific in what you're looking for.