Xenon Lamp Glass: Can Ordinary Glass Handle the Heat?

Inside a xenon lamp, the glass envelope near the arc faces temperatures exceeding 400–800°C. Ordinary glass here would quickly:

1,Soften and deform.

2,Crack from thermal stress.

3,Fail at the metal-seal joints.

Thus, ordinary glass cannot be used for the critical inner arc tube.

Real xenon lamps use quartz glass (fused silica), with a softening point above 1600°C and exceptional thermal shock resistance (＞1000°C differential). Some lower-power designs may use high-borosilicate glass (softening point ≈820°C).

Ordinary glass is only suitable for outer covers or low-temperature parts, never the main arc vessel.

Conclusion: Ordinary glass lacks the necessary heat resistance for xenon lamp cores. Quartz glass is the essential material enabling their safe, high-temperature operation.