Ground effect
lighting, further referred to as "underglow," is an aftermarket upgrade to cars that lights up the ground underneath a vehicle while it is parked or in action.
Many places have banned flashing ground effect lighting, and some colors are often illegal to use as ground effect lighting, such as blue, red and amber. The laws regarding ground effect lighting differ from state to state and city to city, so check your local laws before installing or operating ground effect lighting on your vehicle.
Neon
Neon tube lighting, another technology used in ground backwash lighting, involves a glass tube filled with a certain gas, which receives an electric current. Different gases in the a tube will illuminate in one of 150 possible colors. Because they contain compressed gas, these tubes are prone to breaking when vehicles go over speed bumps.
Legality
USA law restricts some ground effect lighting.
