The Arc LE`s that I have are brighter than the regular white Arc AAA, and significantly enough, IMHO, to make a distinct difference. (Enough of a difference that I bought "a bunch" of the Arc LE`s for personal back-ups and gifts while they were still available.) I`ve found the Arc LE to be a very handy flashlight.
The Arc LS, however, is in a separate and different class, and in a brightness category well above the Arc LE.
I was lucky to get two of the first-run Arc LS`s with a white LED. The LS`s are also a great flashlight, and really bright. I mean, REALLY BRIGHT!
My strong LS favorite is the Arc LS with the 123 power pack. It can light up the night like magic, and is extremely compact.
Two great flashlights....
Thank you, Peter!