araxara
X-LR M3AWD, MYLR
I've used the CAN Bus Error Free bulbs in my Porsche Panamera. Those bulbs actually need the extra heat sink because they have a resistor that draws 5W so that a burnt out bulb error is not generated. Since the Tesla does not check for low current usage for a burnt out license plate bulb, there is no need to use these bulbs. Also, not using these bulbs reduces the power usage. Otherwise they draw the same current as the incandescent bulbs.I believe this is the one I bought.
http://www.amazon.com/2-SMD-Canbus-...=UTF8&qid=1358900320&sr=8-5&keywords=6418+C5W
The ones on e-bay may be better as they do not need to be Canbus error free.