Under what circumstances will ordinary incandescent bulbs explode after being electrified?

1, incandescent lamp voltage instability, or more than the rated voltage of the bulb, high-power bulb glass uneven heating, water droplets splashed on the bulb, cold winter night turn on the light may lead to bulb explosion;

2. The filament of incandescent lamp is made of tungsten with high melting point and difficult evaporation. When the rated voltage is applied, when the current passes through the filament, the filament is heated to the incandescent body, and the temperature is as high as 2000-3000℃ to emit light. Therefore, the surface temperature of incandescent bulbs is very high, which can bake combustible substances that are in contact or close to them. According to the measurement, the surface temperature of 100 watt bulb is 170-2 16℃, and the temperature of 200 watt bulb can reach 154-296℃.