I just bought myself a Fenix P1D CE light.
It's absolutely amazing. Such light and features out of such a small package. I am still stunned at what this tiny thing does. It doesn't seem believable.
A have a Surefire E2E with the L4 head which I carry when I can, but this little guy is so small it can go anywhere. Compared to the E2E it's about the same brightness, maybe a little brighter. The Fenix is more of a spotlight where the E2E is more of a flood. The Fenix light pattern is also slightly less "smooth", with a few rings you can see if you try.
It's got 5 modes: medium, high, low, strobe, and SOS. I can barely tell the difference between medium and high on mine--perhaps when the battery runs down more so it goes into regulation it will be more noticeable. On low, which is still very good, better than a mini-mag, it's supposed to give 21 hours of battery life but tests I've seen were more like 13-15 hours of usable light.
The only downside is that it's not much of a combat light. Having to twist the body to turn it on is not conducive to using it that way. Plus it takes two twists to get it to high. For that type of use, or for clearing your house, I'd still go with my E2E.
If you're looking for a tiny carry light that can serve both for utility purposes and defense (in a pinch), I'd highly recommend it.