What I'm saying is solar energy is more abundant than oil. And to use solar energy we should efficiently harness the energy and even generate the nuclear fusion/fission reactions of the sun here on the earth, so we can have a portable fuel source for exploring the rest of the universe. What happens when the star dies? Then your single source of energy is gone also unless you can generate the same reactions using the same matter as the star. You need the proper balance of night and day to prevent overheating. The earth is a perfect example, it is half light and half darkness. However, too much or too little of anything is bad in my opinion. Too much sun and you will burn up like Mercury or Venus. Too little sun and you will be too cold like Mars.