LED brake lights?

What car do you have? DigiTails makes LED tailight kits for a variety of Mopars. I sent them one of my 68 Dart tail light housings so hopefully soon they will have a kit for me. Replacement 1157 bulbs don't work very well with what I've seen. The light they put out isn't reflected by the housing as well and you get a dimmer light.

As far as the side markers are concerned, you can use a standard replacement LED bulb. However, make sure you use colored LEDs. A bright white LED will bleach out the color. Your amber lenses will look white and your red lenses will look pink.

You can get fully electronic flashers from your local parts store.