These large differences are caused by all the other parameters, such as filamenttemperature, filament substrate distance, gas speed in the reactor, etc., which can vary in wide ranges.
In order to observe the phenomenon of the filamenttemperature drop caused by the board-current, the ideal diode filamenttemperature was detected precisely with an infrared thermometer.
为了观察由板流引起的灯丝温度下降现象，利用红外测温仪对理想二极管灯丝温度作了精密测量。
3
The highest temperature-and thus the brightest light-that an incandescent lamp can achieve is the melting point of its tungsten filament.