Involvement:Expert (understands the inner workings) - Ownership:1 day to 1 week
Good quality build both internal and external. Smooth/flat contact at negative end. Decent over-all though out. Deep shining head reflector keep the beam straight.
Compare to Ultrafire 502D, this is double the price. It is still good price for its quality.
This light doesn't give much more output than Ultrafire 502D. I used 2 18650 @ 4.0v x 2. I take my pure guess by compare it to my other flush lights: It output 85 lumen overall and measured 13000 (+/- 1000) lux at 1m (center spot). If you are looking for long through, this is the one for you. Otherwise, some cheaper ones have the same candle power.
This is the best quality build flush light I have bought from DX so far. Quality stands its value.
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