2013 Spark.... LED brake light bulbs?
 

Seems hard to find an LED bulb which acts as both a rear light and brake light... Something to replace the double filament style bulb.
Some state they are dual function but seems they simply mean it can be used for different jobs and not that the bulb actually does 2 jobs!

Anyone point me in the right direction?

Im looking for a 380 bulb in which so many leds light up for normal lighting and then more leds light up when braking.

Dean