NiteHawk was rather stiff lipped about the brightness in lumens when I asked.
If the K2 in NiteHawk can infer a Luxeon K2 emitter then the light output will be at best 140 Lumens.
The Dinotte 200Ls probably use Seoul Z-LED P4 ( 240 Lumens max ) to get their quoted 200 Lumens output.
On a related note, I was just looking at the K2 on the weekend. The power switch was almost impossible to push.
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'06 Cervelo Soloist Carbon | '09 Titus El Guapo | '09 Misfit diSSent | '09 Wabi Lightning
The Seoul is approximately twice as efficient as the Luxeon.
I never could figure out the manufacturers that spec a switch that's hard to push -
are they making the user think twice about using the light?