The main caption on this unused Dexter Press card 87991-B reads:  “AMERICA’S MOST POWERFUL LIGHTHOUSE” and goes on to say that this is “the most powerful lighthouse in North and South America–second most powerful in the world,” with 28 million candlepower.  That kind of claim is a challenge for us, so we went to Google.  It’s amazing how many different ways there are to claim to be “most powerful” and also how many different lighthouses claim this … but Wikipedia tells us that the power of Charleston Light was reduced from 28 million to 1.2 million because the original output was “too dazzling.”  The things we learn.  Grade: 1