Energy is wasted when people forgot to turn off lights or kept lights on when there is sufficient natural light in the area. Energy is also wasted in warehouse and office lighting where sections of the area are not occupied. An occupancy sensor saves energy by turning the light off automatically when not in use and brings convenience to the user by turning the light on when presence is detected.
Numerous researches indicate potential savings from occupancy based lighting control ranging from 20% to 75% as shown in the table below.