Oddly, this very use is what pushed me over the edge. Recently moved, new "old" house, insufficiently lit everywhere (amazing how people used to live), and the garage is lit by a single dim bulb on one wall. I was using all my ZLs on high and swapping out every few hours. Both near AND far work was required, and I kept wishing I had "more power." One of my family got lazy and purchased a gift for herself "from me" so I returned the favor and purchased a gift for myself "from her."
I cheated a little--there is that one-week grace period where you can return/replace a Spark, so I fired it up to make sure it worked. It's sweet; with the reflector pulled, imagine a superbright H501 beam. Plan to run on 3AAs.
Also ordered a bump cap for semi-permanent mounting. It's too large to wear comfortably and unobtrusively on the bare head, IMO.