Audi 80 Coupé seen strange taillight!?!?!

Hi guys, in front of me the last time an Audi t89 coupé was driven in the dark and this one had its light on. Now it is usually so that taillight and brake light represent the two outer “bars”. The coupé, however, which drove before me had now illuminated not only the two outer bars re/li but also the two inner ones next to the “normal bars”…. Can someone follow me? So looked almost similar to the rearlight of a mustang, they also have this beam shape and meh Rere illuminated… The brake light of the coupé’s, however, was again limited to the outer 2 beams, so nothing has changed. Well, my question about it, did he just somehow make it with a bulb himself or does he give it to the accessory trade or the like? Does anyone know that, have seen it before… how did it work? Because it looked really good… would be great if it could help me there jmd…. Greetings Felix