Light ballasts are devices used in lighting fixtures to regulate the current flow to the lamps. They are designed to maintain the correct operating voltage and current to the lamps so that they can operate safely and efficiently. Ballasts can be used in fluorescent, metal halide and high-intensity discharge (HID) lighting fixtures, and they come in a variety of shapes and sizes. They can also be used to reduce electrical consumption in some types of lighting, as well as to reduce flicker and noise. Ballasts are an essential component in any lighting system and are essential for ensuring the long-term performance of the lighting.