Problem solved! Apparently I don't need RCA at all. RF Coxial cable goes straight to the TV from the converter box. I don't know enough about what each cable even does but my dad called me and straightened me out. (So JR, you're right.)
I bought two floodlights because mine stopped working. I didn't really suspect the bulb, but I though maybe they died at the same time. But I put the new ones in and … nothing. My breakers are fine; I think there's a problem with the switch. Though when I went out to my car this morning, one of them turned on. Oh, and my trunk still leaks as well as my kitchen sink. I'll troubleshoot those on another day.
Rob and Melissa are supposed to be flying in tonight (though that's not 100% sure with this mid-Atlantic storm—they have a connection in NC) around 11:30 p.m. I told them to call me and wake me up because I'll for sure be asleep!