To jump back to the general Eternalight review topic: my wonderful wife not only got me a model 3 for Christmas, but tolerated several evenings of me shining the thing around on the ceiling after we turned out the lights and went to bed.
So far, I'm delighted with it. Beyond the light being generally fun to play with, the dimmer feature seems genuinely useful. It's easy to click down a brightness level periodically as your eyes adjust to darkness.
I compared the beam to my Lightwave Illuminator (Lightwave 2000 in headlamp form), and they're pretty close - the Illuminator is a bit dimmer than the Eternalight at full power, and maybe just a teeny bit brighter than the Eternalight at its 2nd-highest brightness setting (the one that nominally should last 75 hours). The beams are very comparable in shape and quality. (Thus, if you're simply after a bright LED flashlight, and don't care about dimming, you might get more bang for your buck with a different 3-AA, 4-LED flashlight)
The Eternalight feels very nice in the hand. My wish list items for it would be that it have (as previously noted) a wider range of adjustment for flash and strobe mode, and also a flatter back end so it could stand up on end on end a bit more steadily. (it can do so already, but needs a hard flat surface.)
