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Old 01-25-2013, 11:18 PM   #2
Hoppy
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The charts shown in the pdf's of specs for the two varieties of XM-L don't support the claims of 20% higher efficiency for the XM-L2. See the chart of relative flux vs current for the two. The charts are almost identical, if not identical. But, this is still the LED to use if you have a very good heatsink and want to drive it at 2.5 - 3 amps for really high output.
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