Bests & Worsts Reviews from Amazon

I am a fan of LED light. I love my tiny Petzl Zipka head lamp. The Zipka's 3 little AAA batteries give decent (not great) brightness for 6 months! (I use mine ~2-3 hrs per week). So I had high hopes for this product, with its newer generation LED bulb and larger size. However, I find that an arm-numbing 3 minutes of vigorous shaking gives about 3 minutes of light! I literally timed it and found that with a 90 second shake (which they recommend) that it starts out brighter than my Zipka. But by 90 seconds of lighting, it is significantly dimmer. By 3.5 minutes there is not enough light to read by. Save your $25.