When I rented a U-Haul tow dolly a couple of months ago, I was asked if I had separate lites for the towed vehicle & when I told them no, they replied that they were reqd but they rented to me anyway. Funny thing is, I had rented another U-Haul tow dolly about a month earlier from another place & was never even asked that question. Anyvay ... drove up to Charleston, SC & then back down from ~Greensboro, SC with vehicles in tow & NO addl lites without getting pulled over. FWIW, I traveled I-95 thru FL, GA, SC & I-26 thru SC. YMMV.