I saw a Caddy with factory LED tailights a few years ago and I just had to get something like that for my car, so I bought these LED bulbs for my tail lights.
In the pictures below from top to bottom, the 4 bulbs in the tail light housing are as follows:
- Rear fog is regular 1156
- Signal is LED 1156
- Reverse is regular 1156
- Park/brake is LED 1157
Pic1: All lights off.
Pic2: LED park lights.
Pic3: LED signal, LED park lights.
Pic4: Regular fogs, LED brakes.
Pic5: Regular fogs, LED signal, LED brakes.
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LED video clip (4 megs)
Notice the on-off characteristic of the LED bulb? It's faster than the regular bulbs I have in the front and the side marker.