One can see light above the head; that indicates a consciousness outside the body. But that itself is not the Truth-Consciousness or Vijnana. But much light descending from there illumines this consciousness.
There's something in it when a body like the widow or the parson prays, but it don't work for me, and I reckon it don't work for only just the right kind.
Live contemplating the body. Contemplate internally and externally. Contemplate the origination of things in the body. Contemplate the dissolution of things in the body.