Led Lights Under Car Legal. After all, it is illegal to use such lights on the public roadways. Most states have specific laws concerning restrictions on the use of accent lighting and other unlawful vehicle modifications, in terms of color, form, type, and location on the vehicle.

I plan on having blue lights, that will be under my dash and my seat, shining down. Most states have specific laws concerning restrictions on the use of accent lighting and other unlawful vehicle modifications, in terms of color, form, type, and location on the vehicle. Laws concerning the use of neon underglow lights are typically covered under the lighting requirements of state traffic laws or motor vehicle codes.