I go for overkill but I ride primarily on a MUT that has unlit segments.

You can't go wrong with a L&M lamp. Excellent quality---I have an arc li-on battery that I bought in 2005 & have used on a regular basis for at least the last two years. Have noticed only very slight reduction in run time due to "age." The Seca lamps (which I now use) are extremely efficient in terms of battery use--better than advertised.

I don't have the Stella but when I need to replace my backup headlight, I will get a Stella.