Why auxiliary lights are not that common in Usa trucks?

[Trenero]

Hello in Europe, you can see many many trucks with auxiliary lights (High beams or fog lights) installed in bars on the roof or on the bumpers to help with the visibility in dificult conditions, even some manufacturers offer integrated auxiliary lights like for example Scania or Daf that offer the cabs with the lights integrated on the roof.

In counter part bast majority of Usa "tunned" trucks you can see them with tons of "chicken lights" but is dificult to see one with auxiliary lights mounted on the roof or bars on the bumper.(I never saw one with lights on the roof like in Europe, only aux foglights on the bumber, I think in ATS you can install it on the Volvo)

Why is that? is there any law against it? or is just simply Usa truckers don't like they way it looks?

[DisgruntledTrucker]

In the U.S., most states have a limit of 4 forward facing white lights. Two headlights, two fog lights and you're at the limit.

In northern rural areas, especially in Canada and Alaska, you'll find trucks with extra lights on the moose bumpers or even light cannons on the roof.

[Trenero]

@Jeepster Thanks for your answer