I don't think there's a "best" kind of clear corners to get; they're all pretty much the same. You might want to put some extra sealant on them before you install them so water doesn't get inside (that's a common problem). There's two bulbs, the big one is a 1157 and the small bulb is a 194/168 (either number will work). I got yellow bulbs from AutoDynamic.com, but I pulled the small bulbs out because they faded after a month or two. The 1157's are still yellow though.