Ultra Light Led is the future. The Ultra Bright LEDs works at a voltage between 3 and 3.6 V and current between 10 and 30mA. This circuit limits the current through a reactance, if instead of a reactance was used resistance need dissipate between 2 and 4 watts to produce the voltage drop necessary for the proper functioning of the circuit. XC= 1/(2pfC) ohms XC= Vrms /I ohms XC: Capacitive Reactance (ohm) Ω I: LED current (ampere)A f: Frequency (Hertz)Hz Vrms: Input Voltage (volt) V Circuit A 16 LEDS serie Circuit with 16 LEDs (A) give a luminance equivalent of a 12W. CX: 0.22µF/630V C1: 22µF/100V ZD: 48V (leds 3 V) Circuit B 23 + 23 LEDS Circuito with 2 series of 23 LEDs (B) give a luminance equivalentt of a 35W bulb. CX: 0.47mF/630V C1: 33µF/100V ZD: 69V/1watt (leds 3 V) Nota- Luminance depends of LED type, can change with diferent leds.