Being energy efficient can save you money, increase your reliability, and protect the environment.

A qualification of electrical products, in which they achieve an appropriate ratio of energy usage to work-type output. For example, an energy efficient light bulb will use most of the input electrical energy to produce light, not heat.

description of a property which has special features aimed at reducing use of electrical or heating power (i.e. insulation, double-insulated windows, high-efficiency furnace, etc.).

Using energy in the most productive, least wasteful ways.