Cree has introduced a new line of CMA LEDs with what they claim has a lumen density that is two and a half times as high as its the company’s CXA2 LEDs. The CMA LEDs come in the same diameters as Cree’s other high power CXA or CXB LEDs. Cree says that the design footprint enables an easy upgrade for CXA and CXB LEDs. Also, Cree says that the CMA LEDs can boost the lumen output of CXA2 LEDs.
Paul Scheidt, Cree’s product marketing manager for LEDs said of light designers, “They are happy with the optics they are using currently but they just want more output to work with.”
For this reason, Cree came out with a higher lumen density series of LEDs, the CMA series. Unlike the companies previous high-power LEDs with a ceramic substrate, the CMA LEDs employ an aluminum substrate and a proprietary in-between layer. The metal substrate can be screwed down directly to the heatsink.
According to the company, the maximum power of the 9mm diameter version of new CMA LEDs is an incredible 41 watts despite the fact that designers had demanded a single LED operating at up to just 30Watts with that light emitting surface diameter. The company claims that the CMAs offer best in class LPW at high currents. Also, preliminary testing indicates a longer projected lifetime and more reliability than other LEDs on the market with the same output.
Potential Applications for CMA LEDs
The company expects that lighting designers will use the new LEDs in track and downlights. Another potential application is in horticultural lighting.
The LEDs come in a broad variety of color temperatures, brightnesses. Standard CMA LEDs come in 2700K, 3000K, 3500K, 4000K, 5000K, 5700K, and 6500K color temperatures. The CRIs for the standard version of the new LEDs range from 70 to 90 depending on the color temperature.
Other versions of the CMA LEDs include the Fidelity and Specialty models. The Fidelity models come in 4000K, 3500K, 3000K, and 2700K with a CRI of 98. The Specialty models feature a color temperature of 3000K below the black body curve and have CRIs of 80, 90, and 98. One additional specialty version comes in 3100K below the black body curve with 90 CRI.
Among the several sizes available, the CMAs come with a 9mm diameter light emitting surface. This diameter is the sweet spot for COB optics. The diameters of the new LEDs include 9mm, 12mm, 14mm, 19mm, and 23mm. Most of the CMA LEDs operate at 36 volts. However, unlike the other models, the 23mm models run at either 48V or 72V.