All you need to do is go and get a electronic flasher from any discount auto parts store. The ones on ebay are the same thing, they just say led on then so they can charge more. I sell LED light kits for cars, you just need to make sure you get the brite LEDs. You also need to make sure yiu use red in the back, and amber in the front. I don't know why but red LEDs shine through tail lap lenses better than white LEDs. The 1157s I sell use 32 LEDs 24 strait back and 8 around the outside to light up the whole tail light.