Whenever we talk about energy saving we always talk about changing our daily habits and go for energy-efficient appliances. But in this modern era of technology where we have more than just bulbs and lights, then why only stick to the old traditional ways. It’s time that we should expand our vision and look for some other alternative that can give us a more efficient output.
The ultimate solution for using light only when needed is – Lighting sensors. Lighting sensors help you every day by detecting and reacting to different levels of light in appliances, switches and machines.
The light sensor is a passive device that converts this “light energy” whether visible or in the infra-red parts of the spectrum into an electrical signal output. Light sensors are more commonly known as “Photoelectric Devices” or “Photo Sensors” because they convert light energy (photons) into electricity (electrons).
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Motion Sensitive Light Switches
One such product which has caught our attention and gained a lot of popularity over the past few years is motion sensor light switches. Motion sensor light switches turn on when they sense someone in the room and are switched off after a certain amount of inactivity. Motion sensors reduce electricity consumption by eliminating the possibility that the lights will accidentally be left on.
You see them more and more in corporate and public spaces because they are convenient for employees and shut off after continued inactivity, significantly reducing energy expenses. In order to detect the presence of a human being inside a room properly, the motion sensor can take advantage of several types of technologies –
Pyroelectric Sensor – It measures infrared radiation, and since everything emits a certain level of IR radiation, it is quite easy to detect major fluctuations emitted when a person passes by. The disadvantage is that the sensor will detect only significant movements and only in a direct line of sight.
Ultrasonic Technology Sensor – This sensor uses ultrasonic technology in order to detect smaller changes in the environment so the light doesn’t turn off when you’re reading a book or typing on the computer keyboard. To accomplish it, the sensor sends a small pulse into the room, which returns and allows the device to detect any changes. The disadvantage is that it can be prone to false detection and it draws more power. Motion sensor light switches reduce energy consumption by 35-45 per cent and can go up to as high as 75 per cent.
Conclusion – Changing the light switches is a minor project, but one that can be incredibly convenient – not having to worry about turning off the lights when you are gone, especially in places that are frequently used, eliminates a common habit that many wish they could get a hold of.