Energy efficiency in  is the ability to use less energy to produce the same amount of light output, with the same quality and performance.  Technological advances in the past decade have improved the energy efficiency of lamps and ballasts by 30%-60%, resulting in lower utility bills and reduced environmental impacts.

Reducing energy consumption by using energy-efficient products such as lowers the need for power plants to generate electricity, which means that they burn fewer fossil fuels and emit fewer harmful pollutants such as carbon dioxide, mercury and sulfur dioxide.