Candle2light - a luminous efficacy booster
Before electric lighting became common in the early 20th century, candles and oil lamps were commonly used for illumination. Even a modern candle producing approximately 80 W of heat energy has a luminous efficacy almost a hundred times lower than an incandescent light bulb. Tea lights are even worse. With a Peltier element it is possible to convert the heat released by a tea light into electricity and drive a highly efficient LED reading light, allowing you to read your favourite book by electric candle light.