The new XLamp XP-E2 LEDs from Cree are claimed to deliver more lumens per watt and lumens per dollar to lower system costs for existing XP-E and XP-G designs. The new LEDs can increase the light output of existing XP-E designs at the same cost and power or reduce the system cost with fewer LEDs, enabling lighting manufacturers to deliver better lighting systems with minimal redesign.
The LEDs have the standard XP footprint (3.45 x 3.45 mm) and are optically compatible with all XP LED versions, including the popular XP-E and XP-G. The LEDs generate cool white light (6000 K) at up to 128 lm/W at 350 mA and 85 °C or 143 lm/W at 350 mA and 25 °C and are suitable for a broad spectrum of high-lumen applications for indoor and outdoor lighting, portable lighting and lamp retrofits and. [via]
New LEDs Double Lumens per Dollar – [Link]