Underglow laws

[bzinn 1]

they are illegal to have "on" while driving as it is a distraction.I always wondered why a semi truck can light up like a space ship but I cannot.

[Gideon]

Originally Posted by bzinn 1

I always wondered why a semi truck can light up like a space ship but I cannot.

You've always wondered why a vehicle more than quadruple your size can have clearance light/side marker lights which actually serve a purpose, but you can't have neon underglow?

[WolfWings]

Originally Posted by bzinn 1

they are illegal to have "on" while driving as it is a distraction.I always wondered why a semi truck can light up like a space ship but I cannot.

Because they're mounting industry-standard 'running lights' but just mount dozens or hundreds of them. There's a reason you don't see blues, greens, purples, or generally even whites on Semi-spaceships except as part of reflective tape. Red? Amber? Yellow? Hell yeah! But those are, literally, a 'running light' in that case.

Also, non-commercial vehicles are often limited in various states to the maximum number of lights they can have projecting light in various directions. 'Running lights' don't count since they're so low-powered also.

Also, realize that underglow doesn't make you more visible at all if there's water or ice or snow on the road. It makes your vehicle a huge patch of glare that, yes, everyone can see coming, but your vehicle then prevents anyone else from seeing the road clearly around you which is the larger issue. It doesn't matter if I can see you, or if you can see clearly, if I can't see the lane markings on my side as a side-effect.