wanted to change the rear too for LED versions.
tried these:
1157 bulb with 60 SMD's.
the difference between normal taillight and brake or signal is almost un-noticable.
check these videos from 2nite.
normal bulb 5W/21W
then the 60SMD Led version: no reflector
then the 60SMD Led version with red reflector:
too bad they didnt bring the result I wanted. changed back to the orignal bulbs again....