Lumileds LLC of San Jose, CA, USA has introduced the LUXEON HL2Z, an un-domed, CSP (chip-scale package), single-sided, high-power LED that is said to significantly reduce system costs while delivering high flux density, high luminance and precise beam control. It delivers luminous flux of more than 315 lumens and efficacy of more than 160 lumens per Watt from a compact 2.3mm-square package that is just 0.36mm high...
Source: http://www.semiconductor-today.com/news ... 0422.shtml