That would be the 2019 upgrade that also has a lower than high setting. I say lower than high because it's still pretty bright on low even though it multiplies run time 10x.
XP-G2? I dunno, maybe a G2a (also called XP-GHE. It throws like the old 2D.
I don't have one to check any more, but if I remember right it looked like a XP-E2, but I could be wrong. I doubt it's a XP-G as that's what the 2D Pro used back in 2012-2013 and that was 274 lumens.