Could it be the pendulum swinging hard before selling in the middle? Once we learn from our mistakes we can find the frequencies that do yield the best outcome

Could it be the pendulum swinging hard before selling in the middle? Once we learn from our mistakes we can find the frequencies that do yield the best outcome and at the same time consume (say) ¼ the energy of an incandescent bulb. Or the minimum set of species yielding optimal outcomes, without the answer being "all of them"