How Do Energy Saving Light Bulbs Work?
Ordinary light bulbs consist of two electrodes with a tungsten filament attached between them. When the light is switched on, electricity flows through and heats up the filament until it glows. Filaments normally reach 2500 degrees Celsius and a lot of heat is given off together with the light. Energy saving light bulbs are a form of fluorescent lighting. In this type of bulb, a gas is encased within a glass tube coated with a layer of phosphor. When electricity passes through the gas, it emits ultraviolet ray that cause the phosphor coating to glow. This is more energy efficient because most of the energy is turned into light instead of heat. Fridges and freezers are on the go 24 hours a day, 7 days a week.
