I disagree with most of this review. Heat sink or no heat sink, this has been one of the best budget lights I have ever purchased. I have used it almost daily around the house for the past year or so I have had it, and it has worked flawlessly. 200 lumens is a good amount of output for just general use and it has never got hot at all while I was using it. I even did a runtime test on it a while back and the light just got lukewarm during the 4-5 hours it was on. I use NIMH cells in in exclusively. The one test I did was with Energizer Recharge 2300 mAh cells and it ran for about 3 hours before any noticable reduction in brightness. I kept another light near me that was also rated at 200 lumens to compare while I was testing. Ozark Trail just released several new models at my local Walmart also, including a 500 lumen 2 mode version which I picked up. It is even better than this light, but I will save that for another thread!! ;p).