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It's been two years since this thread abut 100 lumen/watt LEDs, and now the 200 lumen milestone has just been passed:
http://www.cree.com/news-and-events/cree-news/press-releases/2012/december/mkr-intro
The 200 lumen efficiency is only around 1 watt at around 100 mA or so. It's 1769 lumen at 15 watts (the max rated power)
It's available for $10 in large quantities.
http://www.cree.com/news-and-events/cree-news/press-releases/2012/december/mkr-intro
Two years after breaking the 200 lumens-per-watt (LPW) R&D efficacy barrier, Cree, Inc. (Nasdaq: CREE) delivers another industry first with the introduction of the Cree XLamp® MK-R LEDs. The new MK-R LEDs leverage the SC³ Technology™ next-generation LED platform to deliver up to 200 lumens-per-watt (at 1 W, 25°C) LEDs.
The new MK-R LEDs make the next generation of 100+ lumens-per-watt system possible for high-lumen applications, including outdoor and indoor directional applications, such as halogen replacement lamps. MK-R LEDs are available in EasyWhite® color temperatures, providing the LED industry’s best color consistency for designs that use only one LED. For systems that use multiple LEDs, MK-R enables manufacturers to use fewer LEDs while still maintaining light output and quality, which translates to lower system cost.
The new MK-R LEDs make the next generation of 100+ lumens-per-watt system possible for high-lumen applications, including outdoor and indoor directional applications, such as halogen replacement lamps. MK-R LEDs are available in EasyWhite® color temperatures, providing the LED industry’s best color consistency for designs that use only one LED. For systems that use multiple LEDs, MK-R enables manufacturers to use fewer LEDs while still maintaining light output and quality, which translates to lower system cost.
It's available for $10 in large quantities.