I might consider using a CL2N3 driver instead of a resister. They are a bit more than a resister but they are idiot proof in the future if your power source goes out and they replace with a higher voltage power source. Most of this will go up to 90v.
https://www.digikey.com/en/products/detail/microchip-technology/CL2N3-G/4902353
You can put the resister or driver anywhere on the wires. Doesn’t have to be right next to the LED. 