What colors and types (under body, in-car, etc.) of neon lights are legal?

Lights must not rotate, oscillate, or flash, but state law does not prohibit the use of colored neon lights under your car as long as they do not interfere or blind other drivers. Ohio Revised Code, section 4513.17 prohibits flashing lights on motor vehicles with the exception of emergency vehicles, turn signals, and hazard flashers. As long as the neon lights are less than 300 candle power they are not in violation of any State law. If the lights are more than 300 candle power they must be directed to strike the pavement the vehicle sets upon at a distance of no more than 75 feet. The lights can not exceed 500 candle power. State law requires a white light to illuminate the rear license plate.  more