Also, Drich, I must also mention that evolutionary traits often have dual prupose, so for your claim to be true you must demonstrate that the chlorophyll that absorbs light cannot have another use. Otherwise, another need for survival could have caused a plant to devlop more chlorophyll than is necessary to absorb the energy of the sun. For a hypothetical example, cholorphyll is what gives plants its green color, so there may have been an evolutionary advantage to fully devolp that trait, which would lead a plant to have the ability to process more energy than the sun gives off. So, your next hurdle for your claim that evolution is disproven by plants being able to absorb more energy from artificial light is to prove that chlorophyll has one purpose and one purpose only.
Even if the open windows of science at first make us shiver after the cozy indoor warmth of traditional humanizing myths, in the end the fresh air brings vigor, and the great spaces have a splendor of their own - Bertrand Russell