Some thoughts: I'd looked at headlamps like the Petzl Duo and Streamlight Trident (high-power xenon bulb plus LEDs). They would be fantastic for some applications. Specifically for blackouts, I decided against them, because they're bigger and heavier than the Aurora, without giving me much in return. In a blackout, when you need two hands, it'll mostly be because you're doing something close-up like cooking or changing the baby, so you'll want a long-running LED floodlight almost all the time from your headlamp. No reason to go with a bigger heavier solution when you don't need the extra feature of the xenon bulb -- the PT Aurora is very very lightweight and provides the essential function you need at a cheap price. Now, if I wanted the headlamp to do double-duty as my camping headlamp, then no question I would go with the Duo or Trident.
The Streamlight Septor is also bigger than the Aurora, but by providing a higher-power LED mode (still a floodlight rather than the more focused light the xenon bulb on the Duo or Trident would have). I can't remember why I went with the Aurora rather than the Septor, maybe because again, I was looking for the cheapest smallest lightest package the provided the minimum requirements.
I think all those lights, Septor, Trident, Duo, Aurora, will all serve fine. I've been using my Aurora for other things like dinking around with my computer -- the kinds of things I'd previous stick an Arc LE or LS in my mouth for so I could use both hands.
Anyway, in my experience, having been through 3 blackouts in the past 2 months (!!!), what's required for blackouts in a headlamp is: lightweight and comfortable, able to change angle to point the light where you want it, long running, a few different power levels, floodlight. Anything else -- high-power xenon lamps, very high power LED modes, etc. -- is gravy.
Joe