Since most state's safety reuirements mirror the Federal Motor Vehicle Safety Standards (FMVSS) it might be a good idea to look those requirements up.
IIRC, the FMVSS requirement is that if the load extends two feet or more behind the lights, there must be lights OR REFLECTORS on the end of the load at night, and/or a red flag of a certain size during daylight hours.
The tail light lenses on your towed vehicle SHOULD be designed to act as reflectors when the light is not on. Therefore, it is likely that the towed vehicle is within the requirements of many State Laws and the FMVSS.
I have to wonder; if lights are not required on a dolly towed vehicle since there are reflectors already installed, what about a towbar towed vehicle? It has the same reflectors installed at the factory, and the end of it is only a few feet behind the lights on the towing motorhome, why does it NEED lights?
