The voice-activated sensor lights up when there is noise exceeding 50 decibels within a range of 5 meters. The infrared sensor lights up when there is a warm person or animal within a range of 3 meters. The radar sensor lights up when there is a moving object within a range of 3-8 meters. The light will turn on.
Infrared sensor switch is cheap at about 8-12 yuan, and the more expensive one is also available at 17 yuan. Its sensing distance is only about 3 meters, not 3-5 meters as some people say, whether it is front or inclined, actual measurement in summer The sensing distance is only 3 meters, which is a bit low. In winter, when the temperature is low, it may reach 3 meters or more.
What is better to use is the radar induction LED light. The sensitivity is faster than the infrared detection and is not affected by the ambient temperature. Generally, a 5W radar integrated light costs about 14 yuan, and a 10W radar integrated light costs 20 yuan. The sensing distance can reach 3- 8 meters. The price of the radar sensor switch is around 27, and the sensing distance and lighting delay time can be adjusted. If used separately with LED lights, some manufacturers design switches that will cause the lights to be dimly lit or flicker, so the lights need to be connected in parallel at both ends. A capacitor will be provided by the manufacturer. Some manufacturers have better designs and do not need parallel capacitors to avoid flickering or dimming of the lights.
There is no requirement for the installation distance between the radar sensor switch and the lamp. The infrared sensor switch requires that the installation distance should be more than 50 cm away from the lamp. I don’t know what the impact will be if the distance is too close. It seems to be usable, because some sensor switches are integrated. On the lamp holder, or just assembled on the lamp, as shown below:
The radar sensor integrated lamp is as easy to use as the radar sensor switch worth 27 yuan each. The infrared sensor switch, which costs 17 yuan each, will light up when it is about 2.5 meters away from the side. The front sensing distance is more sensitive than the infrared sensors that cost a few yuan each.
Better radar switches cost RMB 27 each, plus a 5W LED light worth RMB 6. The total is 33 RMB, while the 5W radar sensor LED integrated light only costs RMB 14 each, a difference of RMB 19. It is obvious that the integrated radar sensor light is more affordable. .
As shown below, the radar sensor LED light has a sensor switch built into the bulb.
Radar sensor light
The average floor width of a rental house is only a few meters apart. Using a 3W LED light is just right, 5W is very bright, and 10W is not recommended to be too bright. The minimum radar sensor light is only 5W, so it is difficult to control the brightness. You can buy one and try it out first.
In terms of wiring, those with switches should be connected in series to the live wire, otherwise the LED will be dimly lit. The wire port of the lamp should be connected to the neutral wire, and the middle contact should be connected to the live wire from the switch. This will be safer and integrated. The same is true for the lamp, the wire port is connected to the neutral line.
In summary, it is recommended to give priority to the use of radar-sensing LED integrated lights. Secondly, you can also consider using switches and lights separately. It is best to choose about 27 pieces of radar switches each, and the quality will be more reliable. If the sensing distance is not too far or too sensitive, you can consider infrared sensor lights. However, the use of voice-activated lights is not recommended because the noise will affect others.
