A load control system comprising: an RF transmitter adapted to transmit a plurality of consecutive packets at a predetermined transmission rate, each of the packets including the same command and characterized by a packet length (T PACKET); a load control device for controlling an electrical load receiving power from a power source in response to RF signals transmitted by the RF transmitter, the load control device comprising: an RF receiver adapted to receive at least one packet of the plurality of consecutive packets from the RF transmitter, the RF receiver configured to be periodically enabled for a sample time period (T SMPL-RF) to determine whether the RF transmitter is transmitting one of the packets, the RF receiver configured to enter a receiver sleep mode for a sleep time period (T SLP-RF) between consecutive sample time periods (T SMPL-RF); and a controller operatively coupled to the RF receiver and configured to receive the at least one packet of the plurality of consecutive packets, the controller operable to control an electrical load in response to the received at least one packet; characterized in that: the RF receiver is configured such that the sleep time period (T SLP-RF) is longer than the packet length (T PACKET) of each of the plurality of consecutive packets, and in that the sample time period (T SMPL-RF) of the RF receiver is less than the packet length (T PACKET), and the sample time period (T SMPL-RF) and the sleep time period (T SLP-RF) between sample time periods (T SMPL-RF) are sized to ensure that the sample time period (T SMPL-RF) coincides with at least one packet of the plurality of consecutive packets. an RF transmitter adapted to transmit a plurality of consecutive packets at a predetermined transmission rate, each of the packets including the same command and characterized by a packet length (T PACKET); a load control device for controlling an electrical load receiving power from a power source in response to RF signals transmitted by the RF transmitter, the load control device comprising: an RF receiver adapted to receive at least one packet of the plurality of consecutive packets from the RF transmitter, the RF receiver configured to be periodically enabled for a sample time period (T SMPL-RF) to determine whether the RF transmitter is transmitting one of the packets, the RF receiver configured to enter a receiver sleep mode for a sleep time period (T SLP-RF) between consecutive sample time periods (T SMPL-RF); and a controller operatively coupled to the RF receiver and configured to receive the at least one packet of the plurality of consecutive packets, the controller operable to control an electrical load in response to the received at least one packet; an RF receiver adapted to receive at least one packet of the plurality of consecutive packets from the RF transmitter, the RF receiver configured to be periodically enabled for a sample time period (T SMPL-RF) to determine whether the RF transmitter is transmitting one of the packets, the RF receiver configured to enter a receiver sleep mode for a sleep time period (T SLP-RF) between consecutive sample time periods (T SMPL-RF); and a controller operatively coupled to the RF receiver and configured to receive the at least one packet of the plurality of consecutive packets, the controller operable to control an electrical load in response to the received at least one packet; characterized in that: the RF receiver is configured such that the sleep time period (T SLP-RF) is longer than the packet length (T PACKET) of each of the plurality of consecutive packets, and in that the sample time period (T SMPL-RF) of the RF receiver is less than the packet length (T PACKET), and the sample time period (T SMPL-RF) and the sleep time period (T SLP-RF) between sample time periods (T SMPL-RF) are sized to ensure that the sample time period (T SMPL-RF) coincides with at least one packet of the plurality of consecutive packets.