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  • Great Experimenters KED

    posted by oyster181 on 05/24/2010

    Involvement:Expert (understands the inner workings) - Ownership:1 week to 1 month


    Bright, cheap enough and equivalent quality to some of the known brands.

    Fast switching makes it ideal for 555 timer pulse driver to make one super bright and efficient light that can equal some lower quality Cree.


    No Specs, so had to burn out a few to find limits. Definitely not for direct USB connection as will only last a few minutes before degredation.


    Their is a bit of wasted side throw light and the main beam is about 5 degrees spread, so it is a very narrow focused spot. The color changes from cool white to bluish to greenish with voltage increase, then dies. So keep it in the whiter ranges.


    Ideal voltage is 3.3-3.8v with about 9ma per volt from 3.0-4.2v. Higher voltages do not provide any benefits. It starts to get hot over 3.8v so you are just wasting power too.

    Excellent Value and build quality if you need a tight beam.

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