LED Lighting

[greguw]

Hey Guys , I just ordered a pair of aftermarket tail lights that will look good with my build , its far from stock but should look pretty good .
I was looking into LED lighting , I don't know to much about LED's used in automotive but I have done bikes in the past and had to use resisters to slow down the flasher . Is this the same case on trucks .
I'm going to use a 1156 for the reverse and a 1157 for the brake , any concern on wattage on these as far as amperage conserns with wires .
This is the lens I am going to use will match the black paint on the lover of my build .