You should be good to go.
And by the way-when are you installing them ???
Jeeeezz Bob! They are just side markers!! hahaa. I'll get to them soon. Still waiting for my BT stuff to get here. I plan to put my rear wing emblem on my front grill, but am still deciding what to do with it on the front (something I probably want to talk to you about). But then again, my rear wing emblem would need to be replaced then. Any ideas??

So to answer the question, I'd like to knock all of this out in one go.
I, too, have smoked side markers and got them on eBay. But they fit perfectly and have never had condensation. I wonder if there is more than one manufacturer of these pieces, or if maybe you just got a bad lot?
Anyway, I agree that they could be a shade darker for BB cars. I was thinking of shooting mine with a coat or two of VHT Nightshades to darken them up a bit. Has anyone tried that? If so, please post before and after pics.
No, there are definitely different manufacturers. I helped out an Aussie forum members with a grill and side markers, as the ebay sellers were charging an arm and leg for shipping. This gave me an opportunity to take a look at a different manufacturer version of the side markers and they were MUCH nicer - I've since heard that the fitment is great and the refractor pattern was on the outside of the lens, simiilar to the OEM's but in a honeycomb-like pattern. In the end, Stealth Auto's side markers always get a great review and are recommended. A bit more than ebay ones, but presumably worth it.
As to your VHT Nite Shades question, was that a joke??

Look above. ^^^ I just posted my before/after pics.
EDIT: Oh, I see, you meant the aftermarket smoked ones. Should be a similar result, but less coats would be needed as I really wanted to cover the amber color of the OEM's. I probably did 3 to 4 light coats. 1 or 2 coats on smoked ones should do the job. Go for it. VHT is easy to work with.