An LED lamp puts out more lumens per watt than a fluorescent or incandescent lamp. Similarly, an induction motor controlled by a variable frequency drive can u

An LED lamp puts out more lumens per watt than a fluorescent or incandescent lamp. Similarly, an induction motor controlled by a variable frequency drive can use much less energy by varying its speed instead of using a fixed speed motor starter. VFDs typically get signals from building automation or process control systems and adjust the motor speed accordingly. An arbitrary example would be a fan running at 50% speed generating 50% airflow but using only 25% of the electricity needed to run at 100%. https://www.energy.gov/eere/amo/articles/adjustable-speed-drive-part-load-efficiency https://www.energy.gov/eere/amo/articles/adjustable-speed-dr...