Years back people were discussing the idea of pulsing LEDs. The theory was that plants need so many milliseconds to chemically process photonic energy, so a continuous light source is a waste of energy. LEDs are the only current light source with fast enough switching times to take advantage by this fact.

Some estimates were that power savings might be in the 70-90% range if done properly. Can't be very difficult technically. Any experimenters/theorists here know why this idea has not caught on?

Anyone tried it?