LED tail-lights (OEM look)
 

on my way to work this morning i saw a 99-04 stang with OEM looking tail-lights until he hit the brakes and they were LED'S!!!! it looks factory when off, but bright as hell when on. anyone seen these or know where to get them???!?!?!?!?!?!!?!

They were probably just LED bulbs inside the taillight... you can pick them up at a auto parts store.

def wasnt just bulbs, looked like the leds on a acura tl, or a caddy dts

My boy just got in some LED taillight bulbs...they look like a full LED tallight like the TL's. They are called "Spyder bulbs" and they are like $45 a bulb! Thats probably what the other mustang had in it, i tried them out in mine and like you said they look like the oem taillights untill you hit the brakes and it looks like a full LED light.