In the Solar Insecticidal Lamps Internet of Things (SIL-loTs), when migratory insects with phototactic feature are attracted by the Solar Insecticidal Lamp (SIL) and collide with its metal mesh, the mesh releases high voltage pulse discharge. However, direct assessment of the interference from the above-generated strong electromagnetic pulse (EMP) to ZigBee-based device has not been feasible until recently. We make a design of a discharge simulation module and a data communication device, and make a modification of the SIL, both of which point to a need for more integrative approaches aimed to qualitatively explore whether the interference is existing or not during the process of discharge. Here, we present and experimentally demonstrate a key parameter, the number of microprocessors' Falling Edge Trigger (FET), for representing the existence of interference. We also use comprehensive analyses to suggest that the installing distance between SIL and ZigBee-based device is at least 25.0cm.