What function does a ballast serve in lighting fixtures?

A ballast serves a critical function in lighting fixtures, particularly in fluorescent and HID (high-intensity discharge) lamps. Its primary role is to start the lamp by providing the necessary initial high voltage to ignite the gas within the tube, allowing it to light up. Once the lamp is on, the ballast regulates the electric power flow to ensure that the lamp receives the right amount of current during operation. This regulation is vital for maintaining consistent light output and prolonging the life of the lamp.

In contrast, enhancing color temperature pertains to the quality and appearance of light, which does not relate to the function of a ballast. Connections for multiple fixtures rely on different electrical components, such as sockets and wiring, not the ballast itself. Lastly, while light distribution may be influenced by the design of the fixture or reflectors, it is not a function of the ballast. Thus, the answer accurately reflects the essential operations of the ballast in lighting technology.