Answer

In Jain tradition, there is no fixed scriptural rule for how many diyas a Jain must light on Dhanteras.

Many Jain families light one diya, five diyas, or more according to family custom, devotion, and regional practice.

Explanation

For Jains, the Diwali period is spiritually connected with Bhagwan Mahavir’s Nirvana. Lighting diyas symbolizes:

• removal of inner darkness,
• awakening of right knowledge,
• devotion and reverence,
• auspiciousness during the Diwali period.

Dhanteras itself is more strongly a cultural and regional observance, so the number of diyas varies from household to household.

Takeaway

A Jain may light diyas on Dhanteras with pure feelings, but there is no compulsory number prescribed in Jain Dharma. Devotion and inner purity are more important than the count.