Energy

Polish inventor Maciej Nowak has built a small generator that turns heat from a single tea candle into electricity to power two LED bulbs. The device uses a thermoelectric chip that generates voltage when one side is hot and the other stays cool. While the system produces only about 1 watt-hour of power, it demonstrates how waste heat can be captured and converted into useful light. The LEDs produce a brighter, whiter light than the candle flame alone.