1. A wireless light switch for controlling a light fixture, the wireless light switch comprising:a. an energy harvesting circuit configured to harvest energy from light external to the wireless light switch;
b. an energy storage element coupled to the energy harvesting circuit;
c. a wireless transmitter; and
d. a power and control circuit coupled to the energy harvesting circuit, the energy storage element, and the wireless transmitter, wherein the power and control circuit is configured to provide power to the wireless transmitter and to provide control signaling to the wireless transmitter for controlling the light fixture.