i dont kno about the details n laws elsewhere but in adelaide, this is from what i was told by a roadcop, apparently, as long as the light does not impede with other drivers ie, shine out the windows into others attention it is not gna be illegal, i mean it all gets pretty technical but at the end of the day, even if u get done 4 somethin stupid like that all they'll ask u 2 do is prolly take the bulb out on the spot, theyd hav 2 b real jerks 2 actually fine u 4 it.