There is an increasing focus on Energy Efficiency in the marketplace these days but what exactly is it? A basic definition would be would be using the same or less energy to do more work. This implies a more efficient technology or process. This is used alone or in concert with Energy Conservation which implies a change in behavior to use less energy. Examples of Energy Efficiency would be installing compact fluorescent lighting (CFC), adding more insulation, or installing a more efficient HVAC system. Many technology companies focus on Energy Efficiency rather that Energy conservation as it drives new technologies and new products. However, the most impact will be created by a combination of Energy Efficiency, Energy Conservation, and alternative and renewable energy sources.