LED Bulb for Motion Sensor Lighting | Advantages, Disadvantages
This page covers advantages and disadvantages of Motion Sensor Lighting. It mentions benefits or advantages of motion sensor LED light bulb and drawbacks or disadvantages of motion sensor LED bulb.
What is Motion Sensor Lighting ?
The lighting based on motion sensing of people, animals and objects is known as motion sensor lighting. Motion sensor lights do not require touch to turn ON or OFF the lights. The system us very useful for children, elderly and disable people. There are various techniques employed to detect the motion in such sensors. The two main techniques use passive infrared (PIR) sensor and microwave radar sensor.
Passive Infrared (PIR) Sensor measures infrared radiation emitted from objects or humans in its field of view. Microwave radar sensor transmits EM waves and receives reflected EM (Electromagnetic) signal to detect the object or person movement.
The reflected EM waves helps to determine range of information which include speed (derived from doppler frequency shift), distance, direction of the target (derived from phase difference at antennas) and position (derived from FMCW-Frequency Modulated Continuous Wave).
The common applications of radar motion sensor led bulb are as follows.
• Washroom• Staircase• Parking• Balcony• Passage• Basement• Store room
Radar based motion sensor LED bulbs offer increased detection range compare to PIR sensor based LED bulbs. Moreover radar sensor bulb is more sensitive, more responsive and more penetrating. These motion sensor LED bulbs are available in various power ratings such as 7W, 9W, 10W etc.
The features of technical specifications of 9W radar motion sensor bulb are as follows.
• Luminous Flux : 850 Lumen
• Colour Temperature : 6500 Kelvin
• Life : 30,000 BH
• Material : Polycarbonate
• Lamp Base : B22
• Dimensions : 12.5 x 6 x 12.5 cm
Let us understand the working of the motion sensor LED light bulb.
• When any object or person moves within the range of the radar motion sensor LED bulb, the light will turn ON. The typical range of radar motion sensor LED bulb is about 3 meters.
• When no object or movement is detected in the sensor range, the LED bulb will turn OFF.
• The motion sensor LED bulb does not require switch to be turned OFF. It works in the ON condition of the switch.
Benefits or advantages of Motion Sensor LED Bulb
Following are the benefits or advantages of Motion Sensor LED Bulb:
➨It consumes very low power.
➨It eliminates manual switching of the device i.e. Bulb.
➨Motion activaton saves thousands of hours of run time and hence prolongs life of the LED bulb.
➨It saves energy i.e. electricity. When person forgets to turn off the switch, light bulb automatically gets OFF after few seconds (~20) of idle condition.
➨It uses B22 cap which offers direct replacement to incandescent bulb. It also offers sturdy structure, durability and corrosion resistance.
➨It operates with wider voltage range from 120V to 320V.
➨It works with low light ambiance conditions.
➨Radar motion sensor based lighting does not use UV and IR rays.
Drawbacks or disadvantages of Motion Sensor LED Bulb
Following are the drawbacks or disadvantages of Motion Sensor LED Bulb:
➨It is not designed to use with dimmers and enclosures.
➨It is preferable for indoor use.
➨The light is turned OFF when it does not detect any movement even while person is present in the room. This is annoying in certain situations such as while reading book or watching TV.
➨It does not detect very slow motion.