US Patent 10225903 Light emitting diode bulb, control system and apparatus

An LED bulb includes one or more LEDs that have a forward voltage that is dependent on the thermal temperature of the LEDs. In some embodiments the LED bulb includes a temperature sensor that provides an indication of LED temperature to a power supply so that the voltage provided to the LED bulb by the power supply is optimized and adjusted with respect to temperature so that only the voltage needed by the LED bulb to power the LEDs to an desired light output level is provided to the LEDs, and overhead voltage is minimized.