Does lightning have any purpose other than demonstrating the majesty and power of the Creator?

Yes, It helps provide our daily need of the element nitrogen. Nitrogen is the third most abundant element in the human body, and it must be renewed continually. We are actually surrounded by nitrogen since it comprises 78 percent of Earth’s atmosphere. However, our bodies cannot make use of the nitrogen in this molecular, gaseous form because nitrogen gas has a strong triple bond that is hard to break.  That is where lightning comes in. The great electrical energy of lightning is easily able to convert nitrogen in the air to a useable form.  The scale of this transformation is staggering. Worldwide, storms are estimated to produce one hundred million tons of useful nitrogen compounds each year. Perhaps up to one-half of all usable nitrogen in the soil is fixed or made usable by the energy of lightning.

In addition to keeping us alive, lightning is also beautiful and added beauty is the hallmark of God’s creative style.