Energy efficient definitions

energy efficient

To produce power with less or no waste.
Example: Modern washing machines use less power and so they are more energy efficient than old ones.
Found on http://www.bbc.co.uk/skillswise/glossary/

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energy efficient

Using energy in the most productive, least wasteful ways.
Found on http://www.encyclo.co.uk/visitor-contributions.php

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Energy efficient

Energy efficiency is the percentage of total energy input to a piece of equipment that is consumed in useful work and not wasted as heat. An energy efficient light bulb is one with a higher conversion rate than standard.
Found on https://www.encyclo.co.uk/local/22834

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