The motion sensor or motion detector does it by monitoring the change in radiation levels that occurs in the presence of detection beams. That said, when a temperature change is detected by the beams’ field of view, the sensor is activated, switching on the lights. Furthermore, the lights switch off after a specified amount of time, and if all the beams sense no change in temperature again.
As the motion sensor is built-in into the LED bollard from the point of manufacture, it doesn’t affect the power or lumen output of the bollard, so you can choose what is suitable for your project. For instance, you can have a 2700k warm white LED bollard with an integral PIR sensor. In the same way, you can also choose the mounting type and style of the bollard. Whether you decide on a surface mount bollard, a root mount bollard, or even a flange plate bollard, you can choose the installation method suitable for your project and provide you with reduced operational costs and an extra level of safety with a sensor LED bollard.
Finally, it’s entirely up to you whether you want your PIR LED bollards to operate as on/off when triggered and reset, or if you want to use the PIR sensor with a DALI LED bollard to dim the light output to a low level instead off.