The development of reliable, self-sufficient lighting solutions is essential for emergency and off-grid environments. This paper presents the design and implementation of a compact system utilizing the Thermoelectric Generator (TEG) to convert low-grade thermal energy into stable electricity via the Seebeck effect. The system's architecture focuses on optimized thermal management to maximize the temperature difference across the TEG module, ensuring viable power generation from sources such as candles or small stoves. The harvested energy is regulated by a DC-DC Boost Converter and stored in a Li-ion battery, providing continuous, high-efficacy LED illumination. The successful prototype validates a cost-effective, sustainable, and reliable alternative to conventional battery-dependent emergency lanterns, offering a practical framework for energy independence.