20 may be built using discrete diodes 29 or a conventional modular bridge rectifier may be used gold capacitor 22 is preferably a microcomputer cmos memory backup gold capacitor in the preferred embodiment capacitor 22 is 1 0 farad with a rated voltage of 5 5 wvdc working volts d c if a larger capacitor is used the time of shaking required to charge the capacitor is longer and so is the amount of energy that can be stored led protection zener diode 24 protects led 23 from excessive forward voltage the zener voltage is selected to not exceed the maximum forward voltage of led 23 capacitor protection zener diode 27 and current limiting resistor 25 protect capacitor 22 from overvoltage for extended periods of time the zener voltage is selected to be slightly less than the maximum voltage rating of capacitor 22 the resistor is selected to bleed excess voltage from capacitor 22 while having minimal effect on charging pulses reed switch 26 is single pole single throw with low resistance contacts made for low voltages at low currents it is placed in series with the load to provide a means of connecting led 23 to capacitor 22 to generate light reed switch 26 disconnects led 23 from capacitor 22 when light is not required conserving energy in capacitor 22 led 26 should be disconnected from capacitor 22 during shaking in order to store energy in capacitor 22 more efficiently led 26 may be left connected.