Okay, I know that solar radiation from the sun is already a source of energy to be used as an alternative energy source for light, but solar energy is only one source of light. Scientists have already thought of applying photons as a source of current that would be used to carry out a myriad of digital computations on an optical computer, rather than electrons because electrons generate soo much waste heat and photons essentially do not. I suspect that batteries needed to power up electrical cars generate unnecessary heat as well. Well , why not create a voltage supply that carries optical current rather than electrical current to power a voltage supply for an electrical car, or rather in this case it would be a photonic car. Would you even need to recharge a battery where the source of current is light. Electricity is soo 19th century and 20th century . Why does are source of energy for light have to come from the sun? Why couldn't we used the same source of light that used to produced lasers a certain frequencies on the electromagnetic wave spectrum?