[AT] tractor hauler a pain to install headlights.

[James Peck]

Sounds like a state might need a specialist to enforce this. Still, looks like LED retrofits might best be tractor only.

Steve W. AT List Member and Sun machine owner (swilliams268 at frontier.com); <snip> Depends on your state for enforcement but  ANY light source other than the OEM approved and DOT listed fitment is illegal. If the Hella lights don't have a DOT approval stamp they are illegal as well. That's under Federal law. It comes down to the way the vehicle was built from the factory. If it has Halogen, they are the only legal bulb. As a weird item, ALL of the HID lighting out there is actually under a federal DOT waiver for each make and model built. <snip>