There is none in g3 that have 1/1.2 . G3 4mp with 1/1.8 will give a nice image in low light enviroment
Only 1/1.2 i saw was 8mp g2 version whivh is eol now, replaced by g2h
You could go with dqrkfigther 2.0 and awds plus p-iris, but cost is double of g3 colorvue