Overstocked & on sale 12 volt 18 watt H4 headlight bulb 12 volt 18/18 watt H4 headlight bulb, used on many 50cc, 125cc, and 150cc gas street scooters At only 18 watts, this is a fairly dim bulb but is an OEM scooter bulb on many makes and models. Description 12 volt 18/18 watt H4 headlight bulb, used on many 50cc, 125cc, and 150cc gas street scooters. At only 18 watts, this is a fairly dim bulb but is an OEM scooter bulb on many makes and models. WARNING California Residents : Proposition 65 Warning