@idefix37 thank you! on my screenshot - there is description: "number in one day", it is a little bit confusing
Thunderstorms - defined as number of lighting flashes in the area of one square kilometer, in one day.
but it clears now, thanks - Note that this parameter has units of flashes per square kilometre per day. Conversion of this parameter to units of flashes per 100 square kilometres per hour can give values that are easier to interpret.