The circuit diagram of the components used: 22N6565 many families now use bedside lamp switch, direct-line at the end of this switch on the power cable from the lamp, easy to use and flexible. But after long use, if the power cable rupture will cause potential accidents, if mining security switch as shown in the figure, you can rest assured that use bold. Closing the switch s, thyristor VT may gain triggered by R1, R2 and s current opening charged electric e shall be full wave AC normal light opens the switch S,VT loses the gate trigger current when AC 0 o'clock is cut off, lights. So turn on the light and turn off the lights and any ordinary bed lamp switch. But connection bedside switch s series of power cords have a high resistance resistors R1 and R2 to isolation, so even if the power cable rupture will not cause electric shock accident. VT best use of the trigger the current trigger smaller micro-tube, such as 2N6565, MMCR100-8, one-way tube. R1, R2 should use good quality RJ-1/4W of metal film resistor, the resistance shall not be less than 1.5M ω. Making the entire circuit when mounted in a plastic box of appropriate size, small boxes can be fixed near the lighting e, c, d-side lead-wire plastic wire and bedside switch s series people.