Just found a new (to me) led that looks good from the data sheet.
Seoul Z-Led P4, runs from 350ma to 1A and at 1A has 240lm output. Also has a forward voltage of under 4v so comparable to the 3w or a K2 electrically. They also appear to have the same star configuration and looks like they can use the same optics as a luxeon.
Ive just ordred a couple to test so i'll find out soon if they can. If everything is as the data sheets say then a good upgrade to my 130lm white K2, almost double the light for the same in.
Datasheet http://www.dotlight.de/datasheets/SeoulP4.pdf there if you want to check it out.
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