I was at DCA yesterday afternoon. I had heard here on MC that the neon lighting "ceremony" to the accompanyment of "Life is but a dream" was worth seeing. I asked several CMs what time and didn't get a clear answer. Some said sunset, some said about 7:00PM. I called the Harbor Patrol Newport Beach recorded weather info line (949-675-0503). The official NWS service sunset time was 6:08PM. About 6:08, the song started playing, and the lights started coming on. So there you have it.
(Why no one tells the CMs, I have no idea.)