The document proposes a design called the HLCM (Home Light Control Module) that uses a microprocessor and light sensors for automatic room light detection and control. The HLCM, which will be installed in every light fixture of a home, uses a PIR sensor to detect human presence and a light sensor to measure light intensity. If no one is present, all lights will turn off, but if someone enters, the HLCM will maintain sufficient light by controlling the number of lights. The HLCM also includes an RF module to transmit data between units so lights in different areas can be controlled, and tests showed this design can reduce total power consumption.