I tried the 25w resistors for the fronts but that didn't work out as well.
So I went with 50w resistors. These:
I would recommend checking out V-Leds for bulbs. I paid $50 a pair for mine and couldn't be happier. They are BRIGHT AS HELL! I have gifs to support this lol
And yea I attached them to the steel bumper because they get pretty hot. So I wanted to keep them away from anything plastic.
So far I've only had to replace one rear resistor, but I've had them for quite a while now. And the rears work when you hit the brakes too so it was expected.
If you plan to do ALL exterior leds you may need to add one resistor to the parking light circuit. I ran into a problem where my turn signal would feed back through the parking lights and cause them all to flash. When I switched to the brighter leds from V-leds that stopped, and I think it's because those LEDs have a higher current draw, BUT not enough to stop the hyperflash.
A small resistor wired to the License Plate bulb should solve that in case it's an issue.\
Also I just wanted to add, Adding an LED license plate light really adds a touch of quality to the rear end IMO