A dimmer switch (110-x, 200, 400, 600, 700A, 700B, 1200) adapted to be coupled to an alternating current source, AC source, and to a load so as to control an amount of power delivered from the AC source to the load, the dimmer switch (110-x, 200, 400, 600, 700A, 700B,1200) comprising: a controllable bidirectional semiconductor switch (208, 408, 612), CBSS, to be coupled between the AC source and the load and having a control line which, when triggered, configures the CBSS to conduct so as to deliver a controlled amount of power from the AC source to the load for a corresponding half-cycle of the AC source; first and second triggering circuits (606, 608, 708) coupled to the control line and configured to trigger the CBSS; and a controller (412, 602, 1210) which is adapted to: receive sense information related to characteristics of the AC source, the characteristics including information related to one or more zero-crossings for one or more half cycles of a voltage waveform of the AC source, select one of the first or second triggering circuits to be enabled based upon one or more of the sense information, an operational state of the dimmer switch (110-x, 200, 400, 600, 700A, 700B,1200), and a dimming selection, and enable the selected first or second triggering circuit to charge, wherein when the selected first or second triggering circuit reaches a threshold charge, the selected first or second triggering circuit is adapted to trigger the CBSS to conduct for a corresponding half-cycle of the one or more half cycles and deliver power from the AC source to the load, wherein the threshold charge is reached when a charge time of the corresponding first or second triggering circuit elapses, characterized in that the dimmer switch (110-x, 200, 400, 600, 700A, 700B,1200) comprises a capacitor commonly shared between the first and second triggering circuits (606, 608, 708), wherein when charging, at least one of the first and second triggering circuits charge the capacitor. a controllable bidirectional semiconductor switch (208, 408, 612), CBSS, to be coupled between the AC source and the load and having a control line which, when triggered, configures the CBSS to conduct so as to deliver a controlled amount of power from the AC source to the load for a corresponding half-cycle of the AC source; first and second triggering circuits (606, 608, 708) coupled to the control line and configured to trigger the CBSS; and a controller (412, 602, 1210) which is adapted to: receive sense information related to characteristics of the AC source, the characteristics including information related to one or more zero-crossings for one or more half cycles of a voltage waveform of the AC source, select one of the first or second triggering circuits to be enabled based upon one or more of the sense information, an operational state of the dimmer switch (110-x, 200, 400, 600, 700A, 700B,1200), and a dimming selection, and enable the selected first or second triggering circuit to charge, wherein when the selected first or second triggering circuit reaches a threshold charge, the selected first or second triggering circuit is adapted to trigger the CBSS to conduct for a corresponding half-cycle of the one or more half cycles and deliver power from the AC source to the load, receive sense information related to characteristics of the AC source, the characteristics including information related to one or more zero-crossings for one or more half cycles of a voltage waveform of the AC source, select one of the first or second triggering circuits to be enabled based upon one or more of the sense information, an operational state of the dimmer switch (110-x, 200, 400, 600, 700A, 700B,1200), and a dimming selection, and enable the selected first or second triggering circuit to charge, wherein when the selected first or second triggering circuit reaches a threshold charge, the selected first or second triggering circuit is adapted to trigger the CBSS to conduct for a corresponding half-cycle of the one or more half cycles and deliver power from the AC source to the load, wherein the threshold charge is reached when a charge time of the corresponding first or second triggering circuit elapses, characterized in that the dimmer switch (110-x, 200, 400, 600, 700A, 700B,1200) comprises a capacitor commonly shared between the first and second triggering circuits (606, 608, 708), wherein when charging, at least one of the first and second triggering circuits charge the capacitor.