The XR are dual current rated and can be driven at 350mA or 700mA. The XR-E Blue range can be driven up to 700mA with the XR-E White is rated for drive currents up to 1000mA.

The XR-C has typical luminous flux levels of 25 lumens at 125mA, 60 lumens at 350mA and 78 lumens at 500mA.

The XR-E White features the latest EZbright™ 1000 LED chip from Cree. Typical efficiency is 70lm / W with luminous flux levels of 80 lumens at 350mA, 136 lumens at 700mA and 176 lumens at 1000mA.

The XR-E White also has vastly improved color uniformity now that Cree has started to use a different phosphor process to deposit a thin, uniform layer of material directly onto the chip surface. The added benefit of this is that it also has a small source size helping to keep the size of secondary optics to a minimum.

These LEDs are achieving efficacy levels previously only available from traditional efficient light sources such as fluorescent bulbs, making them ideal for any general lighting application.

Key features of these components include:

· Extremely low thermal resistance 8°C/W
· High maximum junction temperature 145°C
· Narrow colour bins
· Excellent colour uniformity
· Long life - 50 000 hours, 70% Lumen maintenance
· Small footprint 7 x 9 mm
· Instant on (even at low temperatures)
· Full dimming capability
· Resistant to shock and vibration.