[84LX89GT]

Personally, i don't think they really look good because they're so pale looking. They don't really look like, say, reverse lights which are silvery and clear. They're more of a cheap plasticy look and not to mention you have to buy red bulbs that end up looking pink. I wouldn't recommend it also because it's more likely you'll get sh/t from cops and should you get rear ended YOU could end up with a fine or ticket for having illegal lights, let alone get blamed for the accident. Although some of these MAY not happen, my personal opinion is that there are lots of cool mustang rear lenses that aren't technically "illegal" so the clears are more trouble than they're worth....just my opinion.
It is your car though, so do what you want to customize it.