The present invention discloses a light and heat collinear device, which includes a wire winding part, wherein an end of the wire winding part receives an alternating current, and the temperature of the wire winding part is increased to be higher than a first temperature through increasing the frequency of the alternating current； and a light emitting part, wherein the other end of the wire winding part is electrically coupled to the light emitting part, the temperature of the light emitting part is not higher than a second temperature, wherein the temperature difference between the first temperature and the second temperature is smaller than 5 degrees Celsius.本發明揭示一種光與熱共線裝置，其包含：一繞線部，該繞線部一端通以一交流電，藉由提高該交流電的頻率使該繞線部溫度高於一第一溫度；及一發光部，該繞線部之另一端與該發光部電性耦合，該發光部的溫度不高於一第二溫度，其中該第一溫度與該第二溫度兩者的溫差小於攝氏5度。
