Answer

In Jain Dharma, there is no single fixed age for all devas in devlok. Their lifespan depends on:

• the type of deva
• the specific devlok they inhabit
• their karma and birth-category

Explanation

Devas in Jain cosmology do not all live for the same number of years. Some heavenly beings have a much shorter lifespan than others, while some remain in devlok for extremely long periods.

Their age is usually described in traditional Jain time units rather than ordinary human years. So it is not accurate to give one universal number for all devs.

Spiritual Understanding

Even though devas enjoy great comfort and long life, they are still within संसार and are not liberated souls. Their heavenly life is temporary.

In Jain teaching:

• Devlok is a result of good karma
• It is not final liberation
• After the lifespan ends, the soul takes rebirth according to karma

Takeaway

So, the correct Jain answer is: the age of a dev in devlok varies, and there is no single fixed lifespan for all devas.

If you want, I can also explain the different types of devas and their lifespans in Jain cosmology.