The term "light body" (in ancient sources called "solar astral body") is the fourth density body which is activated with kundalini rising.
A recent answer of Q'uo:
https://www.llresearch.org/transcripts/i..._0303.aspx
A recent answer of Q'uo:
Quote:Z: I have a query. When a person has a Kundalini rising experience, is that the activation of their fourth-density energy body?
Q’uo: I am Q'uo, and am aware of your query, my brother. The rising of the Kundalini to the indigo ray energy center is that which you may indeed describe as the activation of the fourth-density body, that of the green ray energy center, which is then fully energized to be able to experience the higher vibrations now engulfing your planet so that these vibrations may be shared, or channeled, and transmitted to those about the entity experiencing the so-called Kundalini experience. For though an experience which seems solitary in nature, and, indeed, is experienced in this manner, it is one which offers the opportunities for the expansion of consciousness for others with whom the entity experiencing it shall come in contact.
Is there a further query, my brother?
https://www.llresearch.org/transcripts/i..._0303.aspx