It seems you have a misconception. Evolution is merely the mechanism by which life forms change over successive generations. The
origin of life -- how organic molecules become self-replicating and complex -- is a different matter of study in biology, known as
abiogenesis ("life from non-life"). Evolution only influences existing life, regardless of how that life may have first formed (unguided reactions, intelligent influence, supernatural influence, etc.).
As for your lightning-experiment, might you be referring the
Miller-Urey Experiment? According to the linked article, the experiment (first formed in the 1950s) sought to simulate the postulated early environmental conditions of the planet, manipulating electricity and temperature to mimic lightning, water vapour, and so on. Basic molecules (methane, ammonia, hydrogen, water) were thrown into the mix, as these were thought to be prevalent elements in the olden days.
The experiment ended up producing various amino acids -- the building blocks of protein, which are essential to biological functions. Though as the article points out, there were concerns as to the effectiveness and validity of the Miller-Urey Experiment, in the way it went about reproducing environmental conditions. If you were referring to some other experiment involving lightning, feel free to correct me.
Seems to me that if you A) have the right ingredients, and B) place them in the right environment(s), then the phenomenon of life can arise. Life need not resemble the forms found on Earth, but if Earth-like conditions are indeed necessary, then copious earth-like exoplanets have been found in recent years. It stands that if it happened on Earth, it can well happen elsewhere.
As for our solar system, Jupiter's moon of Europa is of scientific interest due to the immense (and warmed) oceans found beneath the external ice crust. Life could be possible there (I forget what other intra-solar candidates there might be, other than Europa). But even if there wasn't any other life in our solar system, the galaxy is immense, with billions of planets. For what reason(s) do you doubt the prospect of life on other worlds in the galaxy?