An energy efficient extremely low voltage DC-LED lighting system

LED lighting is a rapidly evolving technology that produces light in a more efficient way. It is already surpass the quality and efficiency of existing lighting technologies, such as fluorescent and incandescent. Generally, LED inherently is a DC electrical load whereas the power supply in buildings is in AC form. In this study, using the innovative DC-LED lighting system instead of the conventional AC-LED lighting systems is proposed. The benefit of DC-LED lighting system is to overcome the drawbacks of having to convert AC voltage to DC voltage using SMPS for each LED unit, however only one SMPS with high efficiency is enough to supply the DC-LED lighting system. In this paper DC-LED lighting system will save 17.4% of energy more than AC-LED lighting system. One of the drawbacks of using a DC Power line is the voltage drop, which leads to a difference in lighting intensity between each DC-LED lamp. Therefore, to overcome this drawback a powerline communication (PLC) technique is proposed to identical the brightness for all DC-LED lamps. Furthermore DC-PLC LED lighting system can benefits from the Internet of Things (IoT) concept, providing the LED lighting system with unique identifiers will offers an advanced connectivity to control the LED lighting system via Internet.