Cree has introduced the XB-D lighting LED to offer more lumens per dollar.
"The XB-D LED delivers twice the lumens/dollar of other LEDs, in the industry's smallest lighting-class footprint of 2.5x2.5mm," claimed the firm. "The XB-D LED is 48% smaller than our XP package."
That said, the firm has not released prices. Cost reductions are said to come from a "new technology platform".
At least part of the change is applying phosphor to the entire surface of the ceramic tile, rather than isolating it to the die - which is why the clear lens appears to be yellow in the photo.
Electro-optical figures are up to 139 lm and 136 lm/W in 6,000K cool white, or up to 107 lm and 105 lm/W in 3,000K warm white, both at 350mA and 85°C.
LEDs with these maximum figures are unlikely to be available immediately.
"XB-D LEDs are compatible with most existing XP family secondary optics," added Cree, which has not revealed the size of the die within the device.