The Altima clears are a bit bigger than stock lens. So if you install them you will have to cut on your bumper some, the bulb is different as well, so you will have to modify the wiring harness as well. I bought some altima lenses with ornage bulbs if you want them, $40 with shipping and there are yours. I didnt install them too much work.
If you clear them, just use a red bulb or red led. Mine came with amber 194 bulb, I thought about seeing if I could just change the lens out but I dont think that is possible without ruining them. I love the look so I may tackle it again. Once I am done with my tail lights, I have too many projects going on now. A serach on this forum brings up this thread that has 2 links to the lens.