Albright's "secret" identity as Captain Midnight is even less plausible than Clark Kent/Superman: Albright's face is completely visible when he's Midnight, and he doesn't even wear eyeglasses when he's Albright. So the only difference is their outfit. Willing suspension of disbelief and all that.
For what it's worth, the *best* secret identities are Billy Batson/Captain Marvel and Bruce Banner/The Hulk, since they're essentially two entirely different people.
Link to the book:
Captain Midnight in Outer Space