About the lightnings
Lightnings are formed by the electronic charges in the clouds. One part of the clouds get positive charge and the others get negative. This process is not understood yet, but the bottom of the lands becomes of negative charge, while the top becomes positive.
This phenomenon is known from the Middle Ages. Scientists have been trying to find the solution of the formation for 150 years, but so far there have been just guesses. According to J.Abrahamson and J.Diniss this phenomenon is just like a burning silicon sphere / it looks like a candy floss/ that is formed when the lightning blasts into the Earth. Due to the effect of huge current strenght and the forming heat the matter of the silicon of the Earth decomposes, and silicon ions make a thin ball shape. The spherelightning has white or yellow light and it is hot lighter than a 100 watt lighter. Its size is between a golf and a soccer ball. According to withnesses it can be seen for 15 seconds. The luminence, the life-span and the termination of the phenomenon depend on the content of heat.