That seems like a lot of current to pull from just 3AAA. In general, K2 emitters are not favored by the flashlight crowd these days. Sure, they can be very bright, but they're not too efficient and they can get quite hot. In addition, with those batteries, I wouldn't be surprised if this light is at max brightness only for a limited time before it starts to gradually dim, at least on alkalines.

However, if you don't need light for extended periods of time, then it very well might be a decent light for you. Typical household use for most people is probably in spurts of several minutes at a time, instead of leaving the light on continuously for a long time. This could be a good bump-in-the-night or "what was that sound?" kind of lights.