What do you mean?
Hi EP
For a VASIMR 1/6 gee isn't easy at max Isp - thrust power is 1.62*294,000*0.5 = 238 kW/kg(ship mass) - so I don't think it's a viable power-level anytime soon. At 25% engine mass that's 1 MW/kg which is way past any magnetoplasmadynamic drive even vaguely on drawing boards.
Only Orions get megawatt/kg power-levels, but no one is seriously proposing one of those for lunar missions.
Adam