Eneloops or other hybrids (Ray-o-vac) are your best choice, as already suggested.
If you must use alkalines, I would suggest you buy an L2D instead of the L2T v2.0. Using alkalines, the L2T v2.0 will only give you one well-regulated power level (low). The L2D offers 3 well-regulated levels with alkalines (low, med, high). You can use all modes with both lights, but alkalines will die a quick death when used with the L2T high mode or the L2D turbo mode. This is why I prefer the L2D for an emergency or survival type light.