In Jainism, beings in Naraka (hell realms) have a fixed lifespan at birth. It is not measured in ordinary years. It is described in huge cosmic units like palyopama and sāgaropama, so the time is unimaginably long.

Simple idea:

• Lower hells = more suffering
• Lower hells = longer life
• 7th hell = longest life and deepest suffering

In simple language, the 7 hell levels are:

1. First hell – shortest life among hell beings, but still extremely long
2. Second hell – longer than the first
3. Third hell – longer still
4. Fourth hell – much longer
5. Fifth hell – very long
6. Sixth hell – even longer
7. Seventh hell – the longest lifespan in Naraka

Important point:

• Jain texts do not describe these lifespans in a small, easy number like “100 years” or “1,000 years.”
• They use vast cosmic time units, because the duration is far beyond normal human understanding.

About 7 or 8 narakas

• Most Jain traditions speak of 7 hells (Naraka-bhumi).
• Some explanations may mention 8 by counting a sub-division or by different ways of describing the lower regions, but the standard teaching is 7 hell levels.

If you want, I can also give the names of all 7 narakas in simple language.