Lhündrub Tögal (Tibetan: ལྷུན་གྲུབ་ཐོད་རྒལ།, Wylie: lhun grub thod rgal) is a Dzogchen term and practice which holds the semantic field "leaping over", "direct crossing" and "direct approach". The Menngagde or 'Instruction Class' of Dzogchen teachings are, for instruction, divided into two indivisible aspects: Kadag Trekchö and Tögal (thod rgal). The practice of Trekcho is the basis for the practice of Tögal.
http://en.wikipedia.org/wiki/Lh%C3%BCndrub_T%C3%B6gal
Tögal is the practice of "the six lamps" which constitute the preliminaries and the main practice.
The preliminaries constitute the practice of separating samsara and nirvana, "djungne-drosom".
The term 'lamp' connotes something that dispels darkness and refers to the illuminating quality of the practitioner's basic nature. This lamp has six aspects:
the abiding lamp of the ground
the citta flesh lamp
the smooth white channel lamp
the distant lasso water lamp
the pure lamp of the expanse
the bardo lamp of time