I like the idea but am ambivalent about the name. It's not that it sounds superior (I've no objection to that), it's just a little cringeworthy somehow. One thing to note is that the opposite of "Bright" in this context is not "Dim" but "Super" (as in one who holds to supernatural beliefs). This is similar to how the opposite of "gay" (as in homosexual, not happy) is not "glum" but "straight".
"Brights" and "Supers" - it makes everyone sound just brilliant, doesn't it?