What are you calling "tail lights"?
You might also look for "clearance", "marker" or "running" lights for lights that are on continuously.
2012 Sundance 3100RB w/Reese Goose Box
2004 Ford F350 6.0 L PSD, CC, DRW, long bed, B&W drop ball hitch, Firestone Ride-rite air bags.