A lighting system for use in a high-moisture environment, such as a swimming pool, includes a lighting unit having a housing and at least one light-emitting device positioned within the housing. A power supply provides power to the light-emitting device. A receiver positioned within the housing operates with a LoRa modulation format. A mobile control unit located remote from the lighting unit is configured to transmit at least one wireless control signal to the receiver, whereby the at least one control signal controls or changes a characteristic of the at least one light-emitting device, such as an on/off state, a color, a lighting effect, or a pattern of display. Related systems and methods for installing a lighting system for use in a high-moisture environment are also disclosed.