This is still only R&D results, but still...

http://ledsmagazine.com/news/5/7/22

Under standard conditions with an operating current of 350 mA, brightness peaked at a value of 155 lm, and efficacy at 136 lm/W.

White prototype LEDs with 1 mm2 chips were used. The light produced had a color temperature of 5000 K, with color (x,y) coordinates at (0.349, 0.393).

As shown in the graph, the LEDs can be driven at 1.4 A, and produce up to 500 lm.