Our 2nd Gen's require a 3157A bulb in the rear but its only wired to use half of the bulb.
IOW, the rear didn't come with a 3157 socket.
I'm going to install a 3157 socket to both rear turns sigs to use all of the bulb.
Should be ALOT brighter.
Heat generated shouldn't be a concern since turns aren't on that long.
Using them as emergency lights is another potential issue.