Reduce lighting related energy consumption by up to 50% by installing motion(occupancy) sensors.

According to Southern California Edison, the typical office uses 40% of its electricity for lighting. Occupancy sensors can reduce energy waste by taking over light switch chores. This can result in up to a 50% reduction in overall lighting related energy consumption.

Occupancy sensors turn the lights on when they sense someone coming into a room or area, and then turn the lights off some time after sensing the room is empty.

The chart below shows the US EPA’s energy savings estimates for occupancy sensor use in various locations.

There are 3 types of occupancy sensors: passive infrared, ultrasonic and dual technology.

Passive infrared, or PIR, sensors react to changes in heat patterns created by a person in motion and turns the lights on accordingly. They turn the lights off after a preset time (usually 10-20 minutes) in which no motion is detected.

The best applications for PIR sensors are small open spaces, such as private offices and conference rooms.

Ultrasonic sensors work on a principle similar to radar or sonar, they generate high frequency sound waves and evaluate the echo which is received back by the sensor. A change in the echo (caused by motion in the area) triggers the control.

Ultrasonic sensors can detect motion around barriers and are recommended for larger offices with cabinets and shelving, bathrooms and uncommonly shaped areas.

Dual technology sensors are a hybrid of PIR and ultrasonic sensors. They can be used to control lighting in just about any space but large open areas and areas with irregular occupancy patterns are generally the most cost effective.

A lighting audit is one way to determine the cost effectiveness of installing occupancy sensors. Click here to schedule your free audit with The Lighting Company.