For 15 years straight — including this one, even though it was inadvertently left out of the print issue — WRLT-100.1FM, aka Lightning 100, has topped the readers’ poll in the Scene’s annual “Best of Nashville” contest. We started tuning back in around — oh, the time 91 Rock went to meet Alan Freed and Wolfman Jack in the sky, and it filled quite nicely some of the holes WRVU left in our listening. We’re huge fans of Fred Buc’s 18-year-old “Retro Lightning” show at 9 a.m. Saturdays, as we wrote in this year’s “Best of Nashville” issue, and we’re always glad to see Mary Brace, Lt. Dan and the mighty Rev. Keith Coes still on deck. But thanks to Doyle Davis’s “Indie Underground Hour” 7 p.m. Saturdays, sponsored by Grimey’s, there’s a home at Music City radio for everybody from Wild Flag, White Denim and the Dum Dum Girls to Nick Lowe, local hero David Mead and Sharon Jones & the Dap-Kings. That’s a public service in our book. (And if you ever convince Davis to bring his “D-Funk” persona back to the airwaves, we’ll take to the streets in jubilation.) For the first time, the station is hosting a resident artist, singer/songwriter/bandleader Gabe Dixon, and he’ll conclude his string of appearances with three gigs this week: hosting Lightning 100’s “Theme Thursday” throughout the day today; appearing live as guest DJ and performer on “Morning Lightning” during drivetime; and finally as featured artist on the station’s long-running “Nashville Sunday Night” 8 to 10 p.m. at 3rd & Lindsley. All the while, Dixon is helping Lightning 100 raise food, clothing and toy donations for Second Harvest Food Bank and Toys for Tots. Bring items Sunday night and get an exclusive 4-song CD recorded during his performance last week on the station featuring songs from his One Spark full-length.