I've spent a fair amount of time fighting with LED bulbs for automotive fitment, I can tell you they run the gamut from massively superior to downright idiotic. Buying name brand (Sylvania) bulbs of the appropriate type usually goes well, they can be a full radial light pattern and new ones tend to come with internal circuits so they work in either polarity. They also make festoon bulbs that are single direction just for overhead and marking lighting, I rather like those. Many also have internal resistors to be compliant with cars that had lamp sensing, that measure the bulbs resistance to tell you if it has burned out and needs replacing. Of course, many do not, and may easily be dumb emitters that are super directional and have terrible colors and worse lifespans. There are bulbs now that are a simple cob stuffed into a metal shell, a board with surface mount chips on both sides soldered into the metal can that interfaces with the socket. I like them for map lights and such, but they often need to be de-soldered and rotated to get the right direction. Some of the newer ones are just the LED package suspended in a clear plastic bulb shape, I'm suspicious of their lifespan due to the lack of cooling, but they should work and I really like the form factor. LED headlights, also tend to be a mixed bag and also go from overlight bright and blinding garbage to near xenon quality lamps, you get what you pay for. Hikari makes well reviewed lamps, they are my go to. Still important to aim them properly.
