Answer

No — in the usual Jain classification, fire-bodied beings (teukāya / tejaskāya) are a separate class of one-sensed living beings, typically associated with fire forms such as flames, blaze, lightning, forest fire, hot ash, lamp fire, and similar fire phenomena. The sun and moon are not classified as fire-bodied beings; they are Jyotiṣka devas, or astral deities. ( jainworld.jainworld.com)

Explanation

Jain texts treat warm light (ātapa) and cool light (udyota) as modes of matter (pudgala), not as living beings themselves. Some Jain commentaries do say that the celestial planes of the sun and moon have life in their own realm, but that refers to the sun/moon devas, not to sunlight or moonlight as fire creatures. ( wisdomlib.org)

So, if you ask about “in the sun, around the sun, in sunlight, in the moon, in the full moon, and in moonlight,” the Jain answer is: not as fire-bodied beings. The sun and moon belong to the Jyotiṣka category, while sunlight and moonlight are material phenomena. ( jainworld.com)

Spiritual Understanding

This distinction is important in Jain Dharma because Jainism carefully separates jīva, the living soul, from pudgala, matter. Fire-bodied beings are living beings, but sunlight and moonlight are treated as non-living modes of matter. ( jainworld.jainworld.com)

Takeaway

In Jainism, fire-bodied beings are not generally described as living in sunlight or moonlight. The sun and moon are celestial deities, and their light is a material phenomenon; fire-bodied beings are a different class altogether. ( jainworld.com)