Zebralights are good in that regard.
+1
Lots of good recommendations here - lots of good questions - lots of agreement (including mine) that having a very low setting is very useful. For the lowest low, I still enjoy my Surefire T1A. For a bargain that gives a huge range, the Jetbeam RRT0 XML is a great choice (as already mentioned.) If you don't need infinite range of control, the Zebralight SC600 is amazing - 0.1 lumen at the lowest setting up to 750 lumen on turbo ( I measure 738 consistently in my integrating sphere). For a nice bargain - a blend between size, brightness and price, the Zebralight
SC60 (or SC60W if you like warmer, or more neutral tints) is a nice compromise.
The members that have been around for a while will certainly agree - it's absolutely AMAZING the number of choices you have. 10 years ago? Mostly just grab an incandescent and deal with one level. Price? All over the place. But now? LOOK at all the manufacturers that have products that will meet your needs - and the run times, low prices, etc. And they are all pretty darn good. And every member of the forum is passionate about their favorite brand and why it's 'the one' to choose.
I prefer not to openly endorse any brand, but my own collection has evolved through tens of thousands of dollars of lights to a pretty simple collection - I suppose I "endorse with my wallet":
McGizmos
Surefires
Zebralights
Fenix lights
And out of MY collection,
for the mix of low level, high levels and reasonable price, any of the Zebralights will fit the bill. Plus they are tough little buggers - sure, there were some reliability issues in the past, but I've never had any failure from any of the 10 or so I've owned, and I beat the you-know-what out of one
over HERE and it's still going strong.
Good luck!!