No. In Jainism, the soul (jiva) is not a light-bodied physical thing. It is a pure, conscious living principle that is non-material and eternal.

Key points:

• Jiva is sentient and endowed with knowledge, perception, and bliss.
• It is separate from matter (ajiva). Karma grains bind to the soul and affect its experience.
• When bound by karma, the soul experiences bondage and cycle of birth; when liberated, it shines with infinite knowledge and bliss.
• Metaphors like “light” are sometimes used to describe purity or enlightenment, but they are symbolic, not a claim that the soul is a physical light body.
• There are no fundamental differences in the essence of jiva between Digambar and Śvetāmbara views on this basic point: both see jiva as non-material consciousness, not a light-bodied form.

If you’d like, I can share a simple Jain teaching (arth) about the nature of jiva and karma from authentic sources.