Glossary

Occupancy Sensor

Sensing element that detects movement and controls power supply to the lighting unit.

Off-Grade

A building that is built with a crawl space between the floor and the ground.

Off-Peak

Periods of relatively low demand on the utility’s electrical system. In general, off-peak times are considered as 7 p.m. – 6 a.m. and weekends.

On-Grade

A building that is built on a cement slab directly on the ground.

On-Peak

Periods of relative high demand on the utility’s electrical system. The highest demand time is usually mid-afternoon on weekdays.