When lighted lamps required

347.06 When lighted lamps required. (1) Except as provided in subs. (2) and (4), no person may operate a vehicle upon a highway during hours of darkness or during a period of limited visibility unless all headlamps, tail lamps, and clearance lamps with which the vehicle is required to be equipped are lighted. Parking lamps as described in s. 347.27 may not be used for this purpose. This subsection does not apply if lamps that are automatically activated whenever the vehicle is started are in use, if the headlamps are of sufficient intensity to satisfy the requirements for daytime running lamps under 49 CFR 571.108, S7.10.13. (2) Headlamps need not be lighted on a towed vehicle or on a