I already spend many hours on reading all kind of useful stuff from this community. Very informative indeed.
False lighting is one of the issues that people haven trouble with. Because of the false lighting alarms, people are even disabling it, which kind of defeats the purpose of having a sensor. Other people try to rotate it, or move it around in order to minimize the false alarms. But I figured that the sensor is very sensitive and for some situations it is very hard or impossible to find a spot without false lightning detections.
My suggestion to only raise an alarm and suppress or withhold the first lightning from the data unless there is a second detection within the next 10 or 15 minutes, seems simple and effective enough and wouldn’t effect any real thunderstorm alarms. (except that the alarm might come a bit later for storms with very infrequent lightnings)