Systems and methods for managing one or more light sources or other devices are disclosed that utilize a dimmer and demodulator. The systems and methods can be used to modulate light from light sources having four-wire drivers. Each dimmer and demodulator follow a protocol of a lighting control system, and permit use of the lighting control system with lighting fixtures having 0-10 VDC dimming drivers. The dimmer and demodulator preferably communicate via a power line carrier method, which delivers the A/C electrical power and the lighting demand simultaneously.