Rating: 5 / 5
This would be my actual rating due to its unregulated nature, but I'll bump it up since most headlamps of its kind fall into this category.
Super bright and long lasting with 3AAA's. Can't give specific comparisons, but similar to the Petzl Tikka and Zipka in terms of longevity.
Regarding brightness, it has 3 settings (MED, HIGH, and Very High IMO). 21m/32m/41m with battery life of 130h/96h/80h respectively and according to their specs. It'll also "tell" you battery life by holding down the on/off switch and waiting for a series of flashes - the more the merrier: I forget, but 3 may be full battery, 2 med, and 1 low.
It also has a switchlock so no accidentally turning it on in your pack. The LED casing swivels 45 deg up and down as well, so one doesn't need
to keep their head cocked for longer periods of angled viewing.
As for LED's it uses one HI-Flux led w/ a special shaped lens that casts a simultaneous spot and flood. I definitely give this feature a thumbs up in terms of practical use.
Only downfall to its brightness is if you are reading, as it may be too bright in its lowest setting with new batteries. But great for night hiking/bear watch!
I believe mine weighs w/in a gram or two of their specs at 2.5ozs w/3 batteries. Could be even lighter given a narrower headband.
In terms of water resistance it holds its own, but not waterproof.
Its replaced my Petzls and BDs after years of using them and I am a happy camper with the Lucido.