I'm far from being an expert.
I did some research on candlepower forums, those guys are specialists, but also they favor some headlamps I can't afford, like the $300 ones the caver s use.
Their advice was that most of us need flood not spot.
I bought the $12 rayovac at Home Depot and used it for at least a year. I saw what they meant, it is a spot and that meant it was less than optimal f or some jobs. It had a low setting at 35 lumens and a high at 100, I never needed the high. It was great for under the sink, under the car hood, pic king up dog poop, getting to the dark spots in the back yard, etc.
My family got me the Petzl Tikka for Christmas, which is the brand you alwa ys see on National Geographic or Science channel stories. It has 5 levels of brightness and is regulated, meaning some kind of electronic control ove r current flow so you get a steadier light or something. Again I only need the lower two levels and so battery life is awesome. And candlepower was right about flood, for what I do that turns out to be much better. I don't know what it cost, I'm afraid to ask, but I'm guessing $30 or so.