As one of the old relics on CPF....
I've found that at a certain point, there is such a thing as "enough lumens". I mean for practical and general use, not extreme lighting, for which there will never be enough lumens (2600 on my Fenix TK75 and counting). But for practical use, I find that once lights hit the 200 lumen mark, it's actually enough. Beyond that, it's about runtime, which a couple of hours on a single cell is enough. I find that a 2009 Surefire U2 with MC-E emitter, despite being only about 300-400 lumens max, is far more than enough, even in 2015.
I used to say "life begins at 100 lumens" and it really does for me. Today, any light of about 100 lumens or higher is more than enough for practical purposes. We reached that level as long ago as 2005 with my 2-cell first-generation U2, and it's mainly about size and runtime and design since that day. I suppose as my eyes age, I'd like to push that up to 200 lumens, of which there is no shortage of lights which meet that criteria today. But other than that....we certainly are living in times of abundance! Especially if you are simply looking for a utility light.
By way of example, I have this very tattered looking HA-Nat E1e and KL1 LED conversion head from my earliest days on CPF 11 years ago. I modified it to a Cree XR-E, it puts out about ~110 lumens now (previously 25 lumens..!!) .. it's actually enough.
That having been said, there's nothing wrong with collecting and looking for ever brighter lights - I myself greatly enjoyed those days
This is CPF after all!