You might have to re-do calculations. LiIon's X2= 1100mA's at 7.6 volts (8.4 fully charged). Three CR123 = 9 volts at 1300mA's (9.75 fresh) . Will maybe your calculations are not too far off, except LiIon's will hold their voltage better than the three CR123's. Not sure though, in this case. Other issue to consider is Surefires claims of 1 1/2 hours regulated. Check out runtests, available in Reviews. Other issue is improved emiters, and lower vf lux 5's available, that SF would have access to. I will be receiving my L6 soon, and will do some tests, though not the high level tests than some CPF'ers do, but I do have a lightmeter, and bounce tests and lux readings work for me.
Bill