What causes a light bulb burn out?
The most common burn out is caused by filament evaporation. Due to high temperature that the filament is operated at, some of the tungsten begins to evaporate. Since every light bulb is different, the filament does not evaporate evenly. It becomes apparent as soon as part of the filament is thinner than the rest of it, this causes it to either melt or break which causes the bulb not to work. What is a ballast, and how does it work? A Ballast is an electrical component used with a fluorescent bulb to conduct electricity at each side of the tube. It supplies the initial electricity to the bulb that creates the light. It also regulates the amount of electricity flowing through the bulb so that it produces the proper amount of light. What makes compact fluorescent bulbs more energy-efficient? Regular bulbs create light by heating a filament inside the bulb. The heat makes the filament white-hot, producing the light you see. A fluorescent bulb contains gas that when it is excited by electri
