I've become fascinated with this new breed of LED flashlights. Mostly because the batteries last a long long time. The $10 compact size brinkman with one LED is a good light. I put it in my truck a long time ago and the it still works great off of original AA batteries. Last night I bought an Inova X5 for $30. 5 LED bright floodlight, solid one piece construction, waterproof, small, batteries last 20 hrs. If i'm wandering around the backyard by the ranch looking for the dogs I still use the old fashioned big maglite for its whacking ability but the old flashlights seem obsolete. I was thinking about getting a surefire or something when I found the Inova X5. The X5 lights up the yard, how does that compare to the expensive tactical lights. How long do the bulbs and batteries last in those $100 lights. Is 60,000 lumens that important. I don't even know what a lumen is or how it compares. And are Xenon bulbs worth it, how long do they last. Looking for opinions.