It is essentially a Mag623. Most are building these themselves using a 3D mag and 4 x IMR 'C' cells.
Nope, it's the same. The Torch uses a 100W Osram 61623 available here for $3.90: http://www.bulbconnection.com/ViewItem/bcrw/itmid/132/oc/64623 HLX/item.htmlvery interesting, I did not know, but 'the lamp is different!