Right now I only have one 405nm diode. It's the S06J 12x from DTR. At the moment I'm just using a generic glass lens but I think the G2 is supposed to be better although I don't remember the specifics. I don't have a G2 lens to do my own comparisons. My diode does a little over 600mW @500mA but I think the G2 lens is supposed to do over 700mW. I'm not sure how the different lenses effect beam profile.