Not sure what the part #'s are but you need the 2 stage LED bulbs for the tails. Normal LED won't work just like you experienced. I tried to find 2 stage bulbs in my area but have had no luck thus far. Only place I've ever found LED bulbs like that are on replacement tails for some bikes. Most factory vehicles with LED tails don't even use 2 stage. Like cadillacs, they have LED but just use the ones on the side for when the lights are on, then light the whole assembly when using the brakes. Good luck with your search let us know what you find out.