I am sorry I cannot provide where this text comes from I pulled it from somewhere????? It is informative.
When, in the Longde and Menngagde or Upadeshavarga series of Dzogchen, the final attainment is carried to its very limit or very near it, the yogi may attain one of the four modes of death that are characteristic of Dzogchen. These are:
(1) The rainbow body or jalüv, which results from the “mode of death of the dakinis (khandrosvi),” proper to those who have attained the highest realization resulting from the practice of the Vajra-bridge or Dorje Zampavii pertaining to the Longde series of Dzogchen. This realization should not be confused with the so-called “rainbow body” resulting from specific Tantric practices of the Path of Transformation, which is not at all equivalent.
(2) The body of atoms (lü dül thren du dengviii), which results from the “mode of death of the vidyadharas (rigdzinsix),” proper to those who have attained the highest realization resulting from the practice of Trekchö or the Nyingthik (which, as we have seen, belong to the Menngagde series of Dzogchen). This realization is compared to the breaking of a closed vase, upon which the internal space or dimension and the external space or dimension fuse.
(3) The body of light (ökyikui or öphungii), which results from the mode of death called “self-consuming like a fire,” proper to those who have developed to a certain extent the fourth vision of Thögel and/or the Yangthik, and thus attain the second highest level of realization that can result from these practices. This type of body is often called “rainbow body” as well.
The total transference or phowa chenpo (powa chenpoiii), which does not involve going through the process of death and which results from the mode of ending life called “invisible like space,” proper to those who have attained the highest level of realization resulting from the practices of Thögel and/or the Yangthik. P158-159