I used an A2 wwhite LEDs during the NY blackout. I'm not a kneejerk SF devotee (for example, my first A2 leaked as well as 2 of my e2es) , but I must say that the A2 was great for the blackout. The LEDs were more tahn adequate for navigating unlit stairwells and hallways (the duration of the blackout depleted most emergency lighting) and for lighting other tasks with little fear of depleting the batteries too quickly. And, if more light was needed it was there. I had a number of other light to choose from, e1e w/and w/o KL1, e2es, M2, G2Z, M3, M4, but the one I used the most was the A2. The water resistance was useful also -- filling a bathtub and making sure the plug didn't leak was a wet job needing a water-resistant light.
A suggestion -- have a lanyard handy for the A2 -- it allows hands free use when you need it -- and you will need it.
A suggestion -- have a lanyard handy for the A2 -- it allows hands free use when you need it -- and you will need it.